I use an iBook with track pad so I can't look at the mouse settings at this moment... consequently this is guess work on my part.
It sounds like you are inadvertently tapping a super mouse hot key function. Easy enough to do with the super mouse since it's multiple buttons are hidden by its design and construction. From what I remember when setting up a super mouse at school, the system preferences > Keyboard and Mouse settings dialog window should allow you to assign hot keys for bring up the Dash Board with the mouse. Just disable that key... unless you like the function ( i personally use the f-Keys to activate most functions like these). If so, then I'm not sure what the solution might be. Can you change the button sensitivity on a super mouse?
Hope this helps Angeline.
grim
(MAC OSX 10,4.9 Safari 2,0.4 wired Mighty Mouse)
Often when I click on a link (like to these forms), even in the drop down menus, Dashboard jumps to the screen. It takes several tries to open the links.
I have not added anything to Dashboard. I do often use "make text bigger".
I try to be careful re: the pointer.
All that I've done differently is to read about iDisk, which put the icon on my desktop. When I tried to drag that icon to the trash it said to "disconnect" I didn't. (I have to do a lot more reading re: iDisk.)
The problem worsens the longer I have pages open.
Thank you.
Angeline

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