I, personally, don't have this problem anymore, I think it vanished when I did a distribution upgrade - now running feisty. However, since the problem seems to occur randomly, this does not necessarily mean that it's entirely gone.
I, personally, don't have this problem anymore, I think it vanished when I did a distribution upgrade - now running feisty. However, since the problem seems to occur randomly, this does not necessarily mean that it's entirely gone.