PB battery icon not flashing

I know for a fact that the PB is receving the charge because, in fact, it dies if I unplug it.
Richard Huggins wrote on :

In my PB 3400 the battery icon next to the application menu is not showing the animated display normally shown when the PB is plugged in and charging the battery. I have zapped the PRAM and rebuilt the desktop. I know for a fact that the PB is receving the charge because, in fact, it dies if I unplug it. (The battery icon shows drained.)

Does this sound like a malfunctioing battery?

Richard