Physically clean the mouse, remove the battery and put it again and see if that helps. If you have to press the left click forcefully, there is a possibility of accumulation of dirt on the left mouse ...

Is this a laptop? Does the track pad exhibit the same behavior? It's possible both mice you tried are bad, at least that would be my guess. I saw an Apple discussion thread that mentioned "Logitech ...

MSIE 3.0, intellipoint 4.1<BR>It just started happening today but when I click the left mouse button it seems to double click about half the time. I tried restarting and re-plugging in the mouse, ...