Oh and, in the Alert Folder in the package, those picture should also be fixed to 128*128. Don't forget!

I've found out how to fix the "unread message" problem.
Just go into the .adiumicon package, and resize all the PNG file to 128*128, except the offline icon.
Thus in folders Adium remains a 512*512 offline icon, and in the dock the smaller icon matches the badges.
enjoy!

perfect, Hope updated~~~