Remember I was raving about the new Mozilla 1.2 version here? Well, it has only been just a few days and already there is a problem. A problem so bad that Mozilla themselves have pulled downloads of the software.
HOWEVER as of yesterday, Mozilla have posted a new build here which apparently has fixed the problem.
If you installed version 1.2, then I recommend that you upgrade to version 1.2.1 as soon as possible to avoid any problems.