As you might of noticed, the sa-mp forums has moved it's boards to a new one, vBulletin.
(Already noticed signatures.)
The new board has new links to your topics.

Use the search function on the user toolbar to find it.

Yes, this can not easily be helped as SMF and vB have completely different formats for URL's.

Wouldn't it be possible to rewrite them using RewriteEngine (@htaccess)? Just to have them working, while keeping the new format too.

topics's ids changed to.
if not -> just redirect

so -> impossible in easy way.

Yea I have the same problem!!!
What is that??

because of new forum engine.
was: Simple Machines Forum
became: vBulletin

vBulletin is much better as SMF.

that's why we are using it now

I've use vBulletin much years, and I can say, that it better as all softwares how exists.