Thanks for not allowing a preview of my post so that I could edit it before posting it. I was trying to put some things in bold type to make getting the gist of things easier for you--naturally, you made that difficult too--but instead you made me look like a moron.

You did it again. In the "reply" above you won't allow two spaces after the period at the end of the first sentence. I tried to edit it, and it looked like I did, but when I clicked on UPDATE REPLY, your illiterate version appeared (I wonder how this "reply" is going to appear).

Same thing here... but i think it only happen in my netbook.. win 7 ultimate 32bit.. in my desktop win 7 64bit.. this problem didn't happen... maybe luck...

Have any of you tried creating a new profile, customizing it without installing any add-ons and then see if your customizations are lost after closing and then starting Firefox, again?

Anyone comfortable enough should go to Standard diagnostics - Firefox in the Mozillazine Knowledge Base, follow the instructions there and see if an add-on (extension or theme) may be causing the resetting of your customizations.