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Recently on my Mac Pro I have been experiencing phantom clicks and other strange behaviors. I have been rummaging through my system preferences to try and root out possible causes, and recently came across a strange finding in the Exposé panel (the keyboard modifiers are there from my taking the screenshot):

9 mouse buttons?

I have had a Logitech 2-button mouse with a mouse wheel for years, and have never had a problem with it in the past. In addition I am running OS X 10.6.8 and have not had any issues like this up to this point.

Is this a known issue? Is the extensive mouse listing a red herring? Are there any fixes for either issue?

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up vote 0 down vote accepted

I recently found this thread on the Apple discussions forum.

The problem seems to stem from the "Enable access for assistive device" in the Universal Access preference panel, which needed to be disabled. There are mixed reports as to whether or not the issue has been fixed in Lion.

It would appear the long list of mouse buttons (as in my screenshot) is a red herring.

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