When inserting an image or file my webserver (yes the entire server) locks up within a few seconds (Not just the site where moveable type is being used). The RAM is exhausted and tmp folder is full within a few seconds and my data center has to perform a hard reboot. I am running the most recent version of MoveableType 4.26.
What happens is as follows:
Open an entry then select either "Insert Image" or "Insert File." A windows pops up and nothing happens (just white) then the loads on the server go through the roof faster than your can kill the Perl process of mt.cgi.
Anyone else see or have this issue? I'm at a loss and may have to abandon and move away from Moveable Type if I can't find a resolution.
Reported on Movable Type 4.2

I forgot to mention this is running on a cPanel server.
Do you image magick installed?
Yes and mt-check.cgi says everything is installed correctly.
Try switching to GD or NetPBM. The ImageDriver config directive in mt-config will allow you to switch out ImageMagick for one of those.
http://www.movabletype.org/documentation/appendices/config-directives/imagedriver.html
I just tried to reproduce this on a vanilla MTOS 4.261 installation, but I couldn't see any noticable cpu load.
It could be a version conflict between Image Magick and Perl Magick. Is there anything in the server logs?