Inbox forcing Opera to close

[chevy454]

For some reason whenever I'm browsing in Opera, my message client will suddenly pop up on the screen to my "Inbox" page [it says synchronizing folders at the bottom when it does this]...sometimes I can simply hit the back button and return to my Opera window, but about 1/2 the time my Opera window & browser are completely closed, and I'll have to re-open Opera and start over. My wife noticed the other day that this also happens if I use the music tab (I always use S2P)...

Any ideas?