i got a dual-band router. wanted to use the 5 ghz band as i live in nyc, and there are 5000 2.4 networks surrounding me. 
my late-2011 mbp does NOT reconnect to the network when i wake from sleep.
or it takes a long time. i get errors (self-assigned ip etc).
my GF, on a late-2008 mbp, does not have this problem.
after much hunting around, i tried using the 2.4 network...which works every time.
any ideas about this? just wondering why the 5 ghz network hates my mac...
my late-2011 mbp does NOT reconnect to the network when i wake from sleep.
or it takes a long time. i get errors (self-assigned ip etc).
my GF, on a late-2008 mbp, does not have this problem.
after much hunting around, i tried using the 2.4 network...which works every time.
any ideas about this? just wondering why the 5 ghz network hates my mac...