Rafael, what do you mean with "stopped working". This issue is about errating movements, when multitouch is activated and since multitouch is *deactivated* i'm pretty sure, that this issue is not related to you problem. I own a Magic Mouse and I run Ubuntu Natty, too. And I can't confirm your problem. Ubuntu handels the Magic Mouse quite fine, except multitouch, but this is another story.
Rafael, what do you mean with "stopped working". This issue is about errating movements, when multitouch is activated and since multitouch is *deactivated* i'm pretty sure, that this issue is not related to you problem. I own a Magic Mouse and I run Ubuntu Natty, too. And I can't confirm your problem. Ubuntu handels the Magic Mouse quite fine, except multitouch, but this is another story.