While RIM and Japanese carrier NTT DoCoMo still don't know why their BlackBerry Bold is feeling a little toasty around the keyboard, the duo has ruled out a likely culprit, the battery, as its unwelcome heat source. Word on the street is an estimated 30 people have issued complaints about the mobile device heating up while recharging, with around 4,000 units being sold before DoCoMo halted sales. One analyst speculates the issue -- which so far has affected only Japan -- may be based on region-specific software of other customizations. We're sure the pair are working around the clock to get to the bottom of this malfunction, but in the meantime, we recommend dusting off the ol' 8707h to get that retro BlackBerry feel -- y'know, just for kicks.