hmm... never had this problem before too.
Cant seem to find a server offhand that uses PHP 4.3.5 and Apache 2.0.49
The closest I came to was running Apache 2.0.48, and it didnt have that problem.
I'll have to go out and buy something, maybe I'll try and test when I come back.
P.S.: you arent online in Jabber, LonelyPixel?