I'd had the same problem for the last couple of days. I tried searching both logged in and not logged in, with:
Firefox (latest version)
Opera 8.5
IE (latest)
K-meleon
All browsers, both logged in or not would bring me back to the the main advanced search page. Even if I typed something into "Quick Search" it still returned me to the main search page.
However, I just tried a search and it seems to work fine now. Thanks Buck!
Spoiler
testingtest12
Do not meddle in the affairs of dragons, for you are crunchy and taste good with ketchup. Spoiler
testingtest12
.......All those moments ... will be lost ... in time ... like tears in rain.
I went through our custom search templates and verified that all of the code is consistent with the "base" vBulletin 3.6.5 template code. Please let me know if you have any more problems.
Tried a search just now and got the following message:
Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 35 bytes) in /usr/local/apache/sites/gamebanshee.com/htdocs/forums/search.php on line 1033
My gues would be that I get too much threads back, but not sure.