I found that when in debug (SEP typically) to be able to hover over variables or to double click to add a monitor I have to first right click, go to Switch View and then select Show *Listing.
I was at Common in Columbus this week and during a session by Charles Guarino, I noticed that his debug session didn't require this to allow hovering. When I asked him about this he was stumped as he had never had that problem. He was at V8.0.3 but I have had this problem since day one with V8. I never had this issue with WDSCi V7.
Anyone with any ideas on this?