I did, but as stated earlier I reflashed to try single out the cause and its been okay since.

10hrs so far. Latest CSSU with 3G (Dual Mode) connected, light-medium browsing over 3G and Wifi, MfE running at 30mins intervals. Its only dropped one bar so far. Haven't got batterygraph installed because I'm trying to reinstall gradually to find the culprit, so I can't give any more details at the moment.

Please note I haven't got KP installed yet. I'll give it a few days at least before testing that.