This bug is rather critical and fix is trivial. Please, take a look at this bug ASAP. The report: In the properties windows for e-mail accounts, the OK button is constantly disabled. This makes it impossible to chance any settings for the entered e-mail accounts. The OK button shows up enable for half a second, then disables and stays that way, no matter what changes are made. And fix 'll attach shortly. If you wish I can apply patch.
Created attachment 110611 [details, diff] Patch to fix the problem.
*** This bug has been marked as a duplicate of bug 166740 ***