Win 7, 64 bit.  Was a happy 1.9 user for many years.  Recently upgraded to the 2.1 version.  Beta was ok, but the official release periodically stops responding to mouse presses.  I've discovered that if I maximize windows repeatedly over the dock and press Control-ESC multiple times, it eventually recognizes mouse clicks again.

I've also noticed that frequently there are issues with DisplayFusion and ObjectDock using excessive CPU when both are running (this didn't happen w/the old OD).  Unclear if the two issues are related.

I only have one dock:

A tabbed dock, positioned on the top edge, size medium, style Aero #1, Effect (Grow) accessibility (in the background).