I posted on this a while ago on this thread. In talking to a Verizon tech at my local V store he said that this was deliberate on V's part because they had been having trouble with the previous, faster charge times frying batteries and were getting sick of having to replace them. It seemed that V set the new OS update to allow the battery to charge more slowly. It is probably possible to hack, but who knows how, and besides, it would surely void our warranties if we did hack it.

The solution is simple, if a pain: Make sure that every moment your Blackberry can be plugged in to a charging source, it is; in the car, at your office plugged into your computer or the wall, at home at night; basically, anytime that you are not walking around with it and can have it plugged in.