Dear All : I use Thunderbird long time , there is a big problem that I do not know how to solved it. Please get help and assistant from all of you. Problem : When I use combine（Unite） Inbox， thunderbird became slow and freeze , such as 1. restart thunderbird would be waiting one minute, 2. move mouse to select old email down to bottom of page became slow or move and stop, then move and stop. when I select separate email account as gmail. yahoo , thunderbird everything is move good without freeze, and smoothly. Please , I would like getting your assistant and help, how to solved the problem. It is urgently to solved problem for my business and life, thank you! Best Regards! Michael