Quote:
Originally Posted by kelvinyy
I'm not sure that the problem caused by upgrade: the trackball is not working on clicking sometimes (roll to move is ok). I need to click several times to get applications/docs open. The reason I want to upgrade is that when I use 4.6.0.233, the IM messages disappeared after some days though I didn't clear the history. 
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It's a hardware problem. After changing a brand new one, everything is normal.
