so um, if you don't know what's going on, how do you know that vista is the culprit? i suppose that flaming microsoft is always fun, but it won't endear you with customer service.
seriously tho, have you tried running any other java based web applications to see if they work? 2) if you believe vista is the culprit did you try running windows update to see if your version of java or vista needs patches?
3) have you tried sticking your head out the window and screaming "i am not going to take this anymore!" ?
4) did you really read past 3)?
5) get a mac
g'luck
pi