I can smell a conspiracy here!
The last 24 hours is the most used method for browsing the forums.
Some threads have content
they don't want the public notice too much.
The last 24 hours search gets disabled till those topics fall behind. No-one reads beyond first page anyway.
Now the question we should be asking is, are the culprits bribed admins, advertisers or
them cracking the database when thread about [insert something witty] gets a bump.
Honestly, get and keep it working! pretty please.