This happened to my Wireless Intellimouse Explorer 2.0 also. I changed preferences in both the Microsoft Mouse and Keyboard & Mouse pref panels several times; finally and apparently, the preference file was rewritten and the mouse returned to normal behavior (which had been good). I probably could have done this faster by trashing both preference files. Jon ========= On Jun 20, 2007, at 00:04:02 -0400, "David R. Boag" <spikedds at bellsouth.net> wrote: > > Intel MacMini w/ 10.4.9 and Microsoft Intellipoint Explorer 3.0. I > have been having increasingly more double and now triple clicks with > this mouse. I just upgraded the driver and that didn't help. Any > suggestions?