Ever since upgrading from 2.1 on the mac, sourcetree has been hellishly slow. Moving things to and from the staging area causes it to completely freeze up for up to 30 seconds at a time, which basically makes it unusable. I've now gone back to 2.1 from an old installer I found, and it works great. It's as if you've gone from O(nlog2) algorithms to O(n^2) and didn't bother testing with medium to large data sets.
