Magic Mouse causing various apps to freeze.

Good afternoon.
After having spent most of the day researching and trying to figure out why since installing Lion, most of my apps (among others, iPhoto, Google Chrome, Speed Download, iStat Menus,...) become unresponsive at launch or shortly thereafter, I realized that it was due to the Magic Mouse.
Since I plugged in a regular USB mouse, my apps are running fine again.
However, it has only been a few minutes and I already miss my Magic Mouse dearly.
Does anyone have any idea of what I can do to be able to enjoy my Magic Mouse again (my Dad, who lives in Belgium, also has a Magic Mouse and apparently no problem!)?

 

I just found a fix for my problem in another thread, maybe it'll help with yours.