I, personally, didn't repack the bottom bracket, my LBS did. They have tightened it a number of times and each time I would ride about 2 miles and it would make sounds again and there is a lot of play in it, as well. I am assuming that it is just simply warn out.

The history is that I stopped riding it back around 2001 and only returned to cycling last year. I had the bike overhauled by one LBS last spring. It didn't take long for the bottom bracket to make noise and become loose. I rode all of last season that way, well over 1000 miles.

This spring I took it to another shop to get some drops put on it, they repacked it, too. Same thing, by the end of the first real ride it was loose and making noise. Twice they tightened it and both times within miles it was back to being loose.