I searched on "focus" and don't see the following bug reported for the latest BC: I notice that if you are doing anything with the map having focus and then use the "Map Controls" in any way (zoom, pan, rotate), the map loses focus and then no keyboard shortcuts for zoom, pan, tool selection, etc. work. I would say this is a bug since using the map controls is still manipulating the map and clearly it should not lose focus.
Thanks for the response, Falagar. I think when we are commenting on such pretty small issues, it's a testament to how much work you folks at Garmin have done, BaseCamp has clearly come a long ways in the last 1 -2 years!