Suddenly (Started today) when I drag mail from the inbox to any folder Thunderbird freezes & if I click on anything the screen fades and the top bar says "Thunderbird not responding". You cannot kill the program with task manager or by clicking on the "X" box in the upper right. You must shut your computer down to free it up or just wait it out. It usually takes 7 to 10 minutes then Thunderbird closes. When you re-open the program the mail never moved.

I have rebooted several times & have worked on it for several hours. I have also compacted the folders. Just can't fix it? Any help would be great.