I had this happen to me, too... sometimes when I minimise an application it just vanishes and I can't even Alt+Tab into it, though I'm not sure if the Alt+Tab not working is a separate bug or not.
I had this happen to me, too... sometimes when I minimise an application it just vanishes and I can't even Alt+Tab into it, though I'm not sure if the Alt+Tab not working is a separate bug or not.