Alright, what's going on, is it fixable and where are all my posts? :'(
(I'm sorry if this sounds short, but I am concerned).
Don't worry, everyone's posts are fine. :P
The forum kept crashing today, even when I was trying to upgrade it. So, we just finished upgrading the server to one with more memory. It might still crash the odd time, but at least it's much more stable and faster than before.
Unfortunately, it kept crashing when I tried to upgrade the forum after the server was upgraded, meaning I'll need to figure out some other way to upgrade it in the future. :-\
But, everything should now be fine. :)