Threads disappearing ....

[IrPr]

Sometimes when useres start a new thread, it will disappear after couple minutes and never will back again, it happens with different users in different forums

i'm running vBulletin 3.5.4 ( Upgraded from 3.5.3 ) on:
Fedoracore II ( DEDICATED SERVER )
CPU 3.06 Intel
Memory 2G
Apache 2.0.51
MySQL 4.1.15

i had same problem with 3.5.3 before upgrading
i use alot of hacks, over than 50 plugins!
I do not PRUNE!
I do not REMOVE!
I do not MOVE TO ANOTHER FORUM!

then i ran this query:

SELECT threadid, title FROM thread WHERE visible = 0;
NO ROWS!

NOW what shoud i do ?
which hook locations i have to check ?
which modified files?

any suggestion are WELCOME!
hope u guys help me and my forum!

[IrPr]

* bump *
no idea?

[Princeton]

assuming you do not have any files edits...

1)__ Disable Plugin System (vbulletin Options)
2)__ Check if problem exists (most likely it doesn't ... problem is caused by a plugin)
3)__ Enable Plugin System but disable all products/plugins manually
4)__ Enable Products/plugin one at a time
5)__ Check until problem exists
6)__ When you run into problem disable product/plugin that is causing problem and check with product thread for updates.

[Asi9ine]

If you read the emails that are sent automatically to the Technical Webmaster, you should see the nature of the problem more clearly as it is expained in full.