If you are using Fedora 5, and you have MediaWiki installed, and you are allowing microsoft office files to be uploaded to your wiki, you should know that the most recent version of the "file" package, which you will recieve through yum (or whatever software update tool you're using) changes the system behaviour and breaks mediawiki's ability to accept powerpoint uploads. On a working box,
file -bi foo.ppt
will return application/msword. On a broken box, it will return nothing.I have filed a bug with redhat on this. It took me about 30 minutes of debugging to determine what happened :)