Hello All.
I am having an issue with Movabletype 4.1 running on windows 2003 server with IIS (Perl 5.8). Everything runs fine in terms of the blog and the mt-check.cgi returns that everything is setup correctly. I am having an issue installing plugins. For Example, I follow the directions and upload the appropriate files to http://www.domain.com/mt/plugins/ and to http://www.domain.com/mt/mt-static/plugins/ and when I try to access http://www.domain.com/mt/mt.cgi
I get the following error:
CGI ERROR The specified CGI application misbehaved by not returning a complete set of HTTP headers.
As soon as I remove the plugin files from their directories, everything works just fine again.
The paticular plugins I am trying to utilize are as follows:
MT-Hacks User Profiles Visitor Stats Instant Video
All of which look to be listed as compatible with MT4. Any help would be appreciated.
Here is my mt-check.cgi output:
System Information
* Movable Type version: 4.1
* Current working directory: C:/Inetpub/wwwroot/lyfemusiq/mt
* MT home directory: C:\Inetpub\wwwroot\lyfemusiq\mt\
* Operating system: MSWin32
* Perl version: 5.8.8
* Perl include path:
plugins\WXRImporter\lib
plugins\WidgetManager\lib
plugins\Textile\lib
plugins\TemplateInstaller\lib
plugins\StyleCatcher\lib
plugins\spamlookup\lib
plugins\Pagination\lib
plugins\MultiBlog\lib
C:\Inetpub\wwwroot\lyfemusiq\mt\extlib
C:\Inetpub\wwwroot\lyfemusiq\mt\extlib
C:\Inetpub\wwwroot\lyfemusiq\mt\lib
C:/perl/site/lib
C:/perl/lib
.
* Web server: Microsoft-IIS/6.0
* (Probably) Running under cgiwrap or suexec
Checking for Required Modules CGI::Cookie
Your server has CGI::Cookie installed (version 1.20). File::Spec (version >= 0.8)
Your server has File::Spec installed (version 3.25). Image::Size
Your server has Image::Size installed (version 2.93). CGI
Your server has CGI installed (version 2.80). Checking for Data Storage Modules
Some of the following modules are required by the various data storage options in Movable Type. In order run the system, your server needs to have DBI and at least one of the other modules installed. DBI (version >= 1.21)
Your server has DBI installed (version 1.602).
DBD::mysql
Your server has DBD::mysql installed (version 3.0002).
DBD::SQLite
Your server has DBD::SQLite installed (version 1.13).
DBD::Pg (version >= 1.32)
Either your server does not have DBD::Pg installed, the version that is installed is too old, or DBD::Pg requires another module that is not installed. The DBD::Pg database driver is required to use PostgreSQL Database. Please consult the installation instructions for help in installing DBD::Pg.
DBD::SQLite2
Your server does not have DBD::SQLite2 installed, or DBD::SQLite2 requires another module that is not installed. The DBD::SQLite2 database driver is required to use SQLite Database (v2). Please consult the installation instructions for help in installing DBD::SQLite2.
Checking for Optional Modules
The following modules are optional. If your server does not have these modules installed, you only need to install them if you require the functionality that the module provides. Crypt::DSA
Your server has Crypt::DSA installed (version 0.14). XML::SAX
Your server has XML::SAX installed (version 0.13). Archive::Zip
Your server has Archive::Zip installed (version 1.20). Storable
Your server has Storable installed (version 2.16). SOAP::Lite (version >= 0.5)
Your server has SOAP::Lite installed (version 0.52). List::Util
Your server has List::Util installed (version 1.19). HTML::Entities
Your server has HTML::Entities installed (version 1.35). Archive::Tar
Your server has Archive::Tar installed (version 1.3201). Safe
Your server has Safe installed (version 2.12). IO::Uncompress::Gunzip
Your server does not have IO::Uncompress::Gunzip installed, or IO::Uncompress::Gunzip requires another module that is not installed. This module is required in order to decompress files in backup/restore operation. Please consult the installation instructions for help in installing IO::Uncompress::Gunzip. Digest::SHA1
Your server has Digest::SHA1 installed (version 2.11). IO::Compress::Gzip
Your server does not have IO::Compress::Gzip installed, or IO::Compress::Gzip requires another module that is not installed. This module is required in order to compress files in backup/restore operation. Please consult the installation instructions for help in installing IO::Compress::Gzip. Image::Magick
Your server has Image::Magick installed (version 6.3.7). XML::Atom
Your server has XML::Atom installed (version 0.25). LWP::UserAgent
Your server has LWP::UserAgent installed (version 2.001). Mail::Sendmail
Your server has Mail::Sendmail installed (version 0.79). MIME::Base64
Your server has MIME::Base64 installed (version 3.07). File::Temp
Your server has File::Temp installed (version 0.12). Movable Type System Check Successful
You're ready to go! Your server has all of the required modules installed; you do not need to perform any additional module installations. Continue with the installation instructions.

It sounds like you're removing all the plugins at the same simultaneously. If that's so, do them one at a time. Whatever the problem is, it's most likely due to only one of them, and you first need to figure out which. Then you should get in touch with the developer, as by your description this does seem tied to the plugins and not the core application.