Luigi.T
I don't think that you have understood the seriousness of this problem. I have had mouse problems since June 2011 when I got my present iMac. It had Lion, and the mouse problems, and 10 other problems (for one example, the pointer skittered across the screen and scrolled it away so I lost my place). I took it 5 times to the Genius Bar at an Apple Centre but they could find no solution to the mouse problems. I installed Mountain Lion as a clean installation (that is, I erased the internal hard drive, installed the OS and then installed my applications from the original discs (all standard industry-standard ones from Adobe, Microsoft etc.), manually re-entered my email account, Contacts etc. This prevented any corruption being carried over. The mouse problems continued.
This and other threads have documented the widespread problem, also solutions none of which has had any effect for me. Apple surely are aware of it but have decided to ignore it. I have sent them many compaints via their feedback site, as others have done, and this forum is, after all, run by them. I know they monitor it.
I had the choice of struggling to use a faulty machine, or get rid of the Magic Mouse and replace it with an optical tethered mouse. I chose the latter. I still have one bizarre problem: input from the keyboard sometimes gets transferred to Spotlight's input field rather than the document etc. where it is intended to appear. But the computer is usable. You could do the same by ditching your Wacom Tablet.
When I come to upgrading my hardware, I will go to a Windows machine which, although inelegant, seems, from my friends, to work OK.
By all means, all of you, carry on banging your head against a brick wall by fulminating against Apple. It will do no good. I chose another way. I can at least now do work on this rotten piece of junk.
Good luck to all of you, its all youv'e got.