I use cgminer-2.3.6 on my HD 5870 and received 460-462 Mh/s.
In the new version cgminer-2.4.0 was just 418 Mh/s.
Sys. Win7x64 + OpenCl from AMD Catalyst 12.5 Beta
http://www.ngohq.com/home.php?page=Files&go=giveme&dwn_id=1624Maybe, you should pay attention to the new drivers and optimize a new version of CGMINER
WTF?
A download from a web site that includes an add to "Boost Your Internet Connection - Click Here"
Who would be fool enough to get stuff from there rather than ATI?
Edit: and the forum post says "leaked to the web" ...