I am playing around with the new Beta of MT 5.1b 4.
Everything is so far great. Rebuilding tousends of entries works really fast.
My error logfile is showing following error when I am surfing around in Backend (loged in)
Any idea where the Problem is?
[Thu Apr 21 05:38:52 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:38:54 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:38:56 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:38:58 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:07 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:15 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:16 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:19 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:23 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:26 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:28 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:31 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:34 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:37 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:40 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:43 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:44 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:48 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:50 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:53 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:39:56 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:08 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:11 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:17 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:19 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:23 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:26 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:30 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:33 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:37 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:41 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:44 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:45 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:50 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:40:58 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:41:00 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:41:04 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:41:07 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:41:09 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:41:11 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
[Thu Apr 21 05:41:14 2011] [error] [client 85.25.184.223] Cannot find /proc/version - is /proc mounted?
Regards, Chris, an MT Addicted Student.
Reported on Movable Type 5

Hello, Christopher
I'm not sure what is the cause of these error messages, but I think your errors haven't been invoked by Movable Type, but other one.
It seems your server haven't mounted /proc file system correctly.
http://linux.about.com/od/lna_guide/a/gdelna41.htm
I recommend you to ask server's support if you are permitted to make an inquiry.
Sorry if my comment won't be effective.
Thank you for your fast answer.
I was thinking, that the MT is causing the Error in Log file beacuse when I am clicking on links in backend of MT I get parallel those Error logs:
[Wed Apr 20 20:16:56 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi
[Wed Apr 20 20:16:57 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi
[Wed Apr 20 20:16:59 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&blog_id=1&id=35
[Wed Apr 20 20:19:36 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&blog_id=1&id=35
[Wed Apr 20 20:19:38 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi
[Wed Apr 20 20:19:39 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi
[Wed Apr 20 20:19:41 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&blog_id=1&id=35
[Wed Apr 20 20:20:58 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&blog_id=1&id=35
[Wed Apr 20 20:22:21 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&blog_id=1&id=35
[Wed Apr 20 20:22:22 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&id=34&blog_id=1
[Wed Apr 20 20:22:29 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi
[Wed Apr 20 20:22:31 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&blog_id=1&id=35
[Wed Apr 20 20:22:33 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&blog_id=1&id=35
[Wed Apr 20 20:22:35 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&id=14&blog_id=1
[Wed Apr 20 20:23:16 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&id=14&blog_id=1
[Wed Apr 20 20:23:18 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&id=24&blog_id=1
[Wed Apr 20 20:25:14 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&id=24&blog_id=1
[Wed Apr 20 20:25:15 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&id=24&blog_id=1
[Wed Apr 20 20:25:17 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&blog_id=1&id=24&saved=1
[Wed Apr 20 20:25:25 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=template&blog_id=1&id=24&saved=1
[Wed Apr 20 20:25:26 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=list&_type=page&blog_id=1
[Wed Apr 20 20:25:36 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=list&_type=page&blog_id=1
[Wed Apr 20 20:26:18 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=page&blog_id=2&id=2891
[Wed Apr 20 20:26:26 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=dashboard&blog_id=1
[Wed Apr 20 20:26:27 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=list&_type=page&blog_id=1
[Wed Apr 20 20:26:40 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=list&_type=page&blog_id=1
[Wed Apr 20 20:27:08 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=page&blog_id=1
[Wed Apr 20 20:27:09 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=page&blog_id=2&id=2891
[Wed Apr 20 20:27:20 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=page&blog_id=1
[Wed Apr 20 20:27:28 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=page&blog_id=1
[Wed Apr 20 20:27:30 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=page&blog_id=1
[Wed Apr 20 20:27:38 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=page&blog_id=2&id=2891
[Wed Apr 20 20:27:40 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=list&_type=page&blog_id=2
[Wed Apr 20 20:27:55 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=list&_type=page&blog_id=2
[Wed Apr 20 20:27:56 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=list&_type=page&blog_id=2
[Wed Apr 20 20:27:58 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=list&_type=page&blog_id=2&does_act=1&saved_deleted=1
[Wed Apr 20 20:28:08 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=view&_type=page&id=2892&blog_id=1&saved_added=1
[Wed Apr 20 20:28:13 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=rebuild_confirm&blog_id=1
[Wed Apr 20 20:28:16 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi
Plus when I webuild the blog i get this:
[Wed Apr 20 21:37:18 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=rebuild&blog_id=2&type=Individual&next=0&offset=&limit=&total=389&start_time=1303328223&entry_id=&is_new=&old_status=&old_previous=&old_next=
[Wed Apr 20 21:37:25 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=rebuild&blog_id=2&type=Individual&next=0&offset=40&limit=&total=389&start_time=1303328223&entry_id=&is_new=&old_status=&old_previous=&old_next=
[Wed Apr 20 21:37:33 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=rebuild&blog_id=2&type=Individual&next=0&offset=80&limit=&total=389&start_time=1303328223&entry_id=&is_new=&old_status=&old_previous=&old_next=
[Wed Apr 20 21:37:40 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=rebuild&blog_id=2&type=Individual&next=0&offset=120&limit=&total=389&start_time=1303328223&entry_id=&is_new=&old_status=&old_previous=&old_next=
[Wed Apr 20 21:37:48 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=rebuild&blog_id=2&type=Individual&next=0&offset=160&limit=&total=389&start_time=1303328223&entry_id=&is_new=&old_status=&old_previous=&old_next=
[Wed Apr 20 21:37:55 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=rebuild&blog_id=2&type=Individual&next=0&offset=200&limit=&total=389&start_time=1303328223&entry_id=&is_new=&old_status=&old_previous=&old_next=
[Wed Apr 20 21:38:09 2011] [error] [client 141.99.254.253] Cannot find /proc/version - is /proc mounted?, referer: http://www.allesgelingt.de/cgi-bin/mt502/mt.cgi?__mode=rebuild&blog_id=2&type=Individual&next=0&offset=240&limit=&total=389&start_time=1303328223&entry_id=&is_new=&old_status=&old_previous=&old_next=
It has to be Movable Type (I think).