I've been trying out 1.2 for several days on beefy Mac Pro (running OS 10.6.

and so far and I'm having two major issues that are preventing me from purchasing.
- Sorting doesn't work when you use files with different extensions (CR2 & CRW)
- Images take several seconds to show at full quality (in the Media tab)
I compared the same set up in EM2 and it doesn't have these issues.