I get the same problem
More as a token of support, rather than a fix - I get the same problem. I have also been charging my macbook pro up with my girlfriend's macbook charger as we're travelling and I didn't want to take two chargers.
Besides the fact that it takes forever to charge my macbook pro with the 65 charger I thought this might be a contributing factor?
My battery shows as being fully charged (by pushing the battery meter button on the underside of the lappie)