Right - with the new build (6.0.4.10714) on my main DB, the right click is still slow (2 - 3 secs) and has a CPU blip, but, actualy getting the properties is (with CPU blip) down to a workable 1 -2 secs, and on the test one seems to be less than 1 sec (reading the change log for this release i see you've already done some work to displaying album properties).

I have sent you a copy as requested by email.