Not sure what's happening on my Vodafone Magic...
Rooted it so i could install the HTC (htc_ime) keyboard. All that went fine all working ok. However since i've noticed my phone seems to be randomly using 5mbs of data every few hours. Can see this in netcounter. At one time i actually caught it happening, checked taskiller and closed everything that was running, yet the data still carried on transferring!!!
I've done a wipe to factory and set up again, just checked the phone before it was on 9mb, closed everything in taskiller, left for maybe an hour or two just looked and it now says 14mb.