Another bug from the April update appears to be that if the secondary computer has "Enable Fake Pointer support.." on, the Primary connects to a black screen. Sometimes a tap of the keyboard will bring it up. Sometimes waiting a second or two. Sometimes disconnecting and then reconnecting does the trick. Sometime nothing at all works except manually striking the keyboard on the secondary.
Turning this setting off seems to completely fix the problem. Still testing though.
PS And I still think the titles should read "Computer Name - Multiplicity 3" (instead of vice versa) so that multiple instances in the taskbar can be more easily identified. But that's just a plug for my previous feature request, hehe. 
