I sure most of you know already, but I wanted to let others that don't already know that AMD released Catalyst 13.4 drivers and 13.5 Beta drivers yesterday. So far I've noticed that I'm getting the appropriate hashrates from my 7870 (Stock, getting ~280kh/s scrypt mining) as apposed to when I was on 13.2 and 13.3 Beta only getting ~220kh/s

http://support.amd.com/us/gpudownload/windows/Pages/radeonaiw_vista64.aspx

Hopefully if anyone else was getting lower that expected hashrates like I was, this will give you a boost

Happy mining