MyBB Community Forums

Hi, my forum is pretty old and everything was allright for all the time, except today suddenly out of nowhere when I try to login (not admin, just as regular poster) it gives me this error:
http://img685.imageshack.us/img685/962/mybberor.jpg

What is going on? The strange thing is that I did not change anything since the last time when all was good and had no problems logging in..

please advice

EDIT:
not only when logging in, but having errors just going through pages/threads, on top of the whole forum there are errors like this:
http://img685.imageshack.us/img685/9238/mybb2eror.jpg

Upload a new copy of ./inc/class_parser.php from a fresh download of MyBB.

Remember to upgrade to the latest release if it is old....

Ah yes, missed that, how old are we talking??

I don't remember which update is that, but I updated to the new version about 3-4 weeks ago.
The strange thing is that it worked well after update and just suddenly I saw this problem. But I did not touch any files since the date I upgraded..
I will try to update that file, but as I said I did not touch it so it should be the same

(2010-01-26, 08:26 AM)MattRogowski Wrote: [ -> ]Upload a new copy of ./inc/class_parser.php from a fresh download of MyBB.

It worked.
but I still would like to know what happened. Like I said I did not touch any files and it suddenly happened. Just want to make sure it won't happen again.