Sorry for the miss-information. I need to do better. You are correct.
In my defense, such as it is, I have v2.0.5 installed with Winamp and I very seldom use it. I try to keep up with what's going on with Winamp, but other than a brief period of testing a new release, I only use it when I need to embed album art. Now when I need to do that, I mostly use the Quinto Black CT v3.7 skin.
Now that you have pointed out my error, I remember that I don't like the way coverflow works in v2.0.5. I should have said it works differently, instead of saying it doesn't have the feature. I now remember I don't like a lot of the changes in v2.0.5.
As you know, there are 4 images instead of 5 and the portions of album art are larger in v2.0.5. It takes a little longer for each image to appear and I don't have the same image repeating when I load Winamp with v2.0.5. It works as expected, in that I get the images from the selected track in the playlist and the first few following it.
Of course WACUP, with core code changes, now works a lot differently than Winamp, internally. Anyway since you don't have my coverflow issue with WACUP, it probably is something in my configuration or the way it's setup causing this issue (which is very easy for me to live with since a solution has not been quickly found). Of as dro says, it's due to the way gen_ff lets requests for metadata from different threads at the same time get stepped on.