The "number of bars" (signal strength meter on the status bar) seems to fluctuate rather wildly on the Droid. I'll be in a stationary location with 4 bars, then it'll drop to zero bars and back up to 4 again. The fluctuations appear to coincide w/ data transfer such as sending an IM via Google Talk. Is there a technical reason for this (perhaps a characteristic of CDMA?) or is the signal meter just spastic?