So I know there's a bug that prevents automatic seamless switching between 3G and WPA-Enterprise Wi-Fi; however even if I switch it manually through internet connections the switch still does not work...

VoIP over 3.5G is really lossy for some reason so I would like to be able to manually switch to Wi-Fi before receiving one, but doing so drops the call and disconnects all my VoIP/IM accounts (and I can't even reconnect them directly without getting network errors).

Is there a solution to this?