using macbook air,
virtual box 4.1.16 and mac os x 10.7 and now recently on 10.8
issue was on both.
basically i would be using virtual box,
put my mac to sleep, wake it up at a different location (and different network)
and windows would not be connected right.
i either have to disable / enable the network connection in windows,
or goto the network menu in virtual box, choose a different network connection (nat or any thing else),
and then switch back to bridged networking for the machine to get the correct ip address.
is this just the way it is or am i dong something wrong?
i know parallels and fusion never had this problem.