I couldn't get the Sims 3 to run with 10.10e on a 6870. Don't forget to report this issue. Link to Catalyst Crew Feedback I wouldn't agree with either statement. There are always more changes than listed in the change log and WHQL certification takes quite a while. The fact that 10.10e was newer than 10.11 should show that. I never run driver cleaner. It has always caused me more problems than it is worth. A simple uninstall and reinstall is enough for me.