When the main panel is in Album Cover view, and you have the expanded panel enabled, when you click on an album the expanded panel opens.
That makes it slightly difficult if you just want to select several albums (by clicking and holding Ctrl).
Also it is not possible to play an album with a single-click on that album.
I would much like it if it would be possible to have two small area's on the album cover (e.g. top left and top right) where you can click to either play the album directly, or to only select it. Probably with small icons that appears on hover-over.