This doesn't seem to be problems with mediawiki itself. You can probably get more help from PHP/Apache communities.
Michael Daly wrote:
According to the PHP bug list, such a bug was fixed with the Feb 8 2007 PHP release. However, that's the release I'm using.
Try a more recent PHP version? http://snaps.php.net
(...)
Nonetheless, the page displays correctly. I understand that on Windows, there's a problem with a colon in the path. This seems to get kicked out at an intermediate stage in the URL rewrite processing. Any idea on how to get rid of this message?
Windows doesn't allow colons on filenames. As it's being rewritten, it shouldn't even be passed to the filesystem.
Check the RewriteRule