I'm still using Snow Leopard. Won't install Lion till it's been out longer & the initial bugs have fixes. Never have used a mouse with the Mac. Only thing that might help: I've noticed that intermittent problems occur with Safari & I'll switch to Fire Fox. Problems vanish. Or vice versa. Not always, but often. Computers are weird like that, at least for me. Like changing out cables fixes a problem but I don't know why, or plugging into different electric.

I love computers but they treat me bad.