Microsoft Visual C ++ Runtime library Runtime Error?

[maurak]

Often when I am typing a private message on facebook and i have been typing for a while this "runtime error" happens and closes my program.

The message that comes up is titled:
Microsoft Visual C ++ Runtime library

and in the body of the message it says:
Runtime Error!
Program: c:\programfile (x86)\Mozilla Firefox\firefox .exe

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.

I was wondering if anyone could tell me what I should do.
I would be ever so obliged!

[Banfa]

What it says contact the applications support team, try the FireFox support forums http://forums.mozillazine.org/viewforum.php?f=38

Actually it might be worth trying a clean install of Firefox, especially if you use a lot of Add-Ons.