Does IOS5 do anything about the behaviour of WIFI versus GPRS/3G, where if the signal levels are
both fairly weak, it can't quite decide which one to use, and the result is long disconnections / IP changes etc which terminate VPN etc connections, web sessions, cause pprune to log out

etc.
The Apple-suggested fix is to disable one or the other, manually.
Windoze doesn't have this problem. If you have both WIFI and 3G concurrently, both connected, it seems to prioritise them so WIFI gets used all the time it is present.
I also read in some US forum that IOS 5 wipes all application config. Is that true?