@PPD:
Actually, the distinguishing characteristic, for me, is that the link points at 'index.php' without an '?' following.
For example, if you look at the top-ish menu bar ('HOME HELP SEARCH PROFILE MY MESSAGES MEMBERS LOGOUT'), do you find that only the HOME link is crazy, and all the others work?
If you look at the two links I was referring to before, they show as
"
http://www.wayofthepixel.net/pixelation/index.php" and
"
http://www.wayofthepixel.net/pixelation/index.php#1" (1 being the number of the category "General" in this case.)
Everything else works. Since you've managed to reproduce this, I'm now moving to the hypothesis that it's an effect caused by a combination of a) the PHP giving bogus header information when no parameters are given, in a way that is harmless to most browsers, and b) A browser that actually interprets that data rather than simply ignoring it.
To demonstrate, try these links instead. They work for me:
http://www.wayofthepixel.net/pixelation/index.php?http://www.wayofthepixel.net/pixelation/index.php?#1It will be fascinating to see if PToing has anything to say about this (and WTF orchids and onions have to do with pixelation. Maybe they are just random junk data stuck in a database or cache somewhere on the server.)