1. Nope, there are no known issues.
2. Yeap, thats how the debugger works, not a bug though. Its just a simple pat saying hey your logic is off a bit.... well as far as its concerned that is.
3.It may not sound right but dummies are often more elegant than making a custom movement.
4. The layout object is very very bugged. It misses clicks, and several other things.
As long as every thing is set to timedelta, timescale should work fine, but I have no idea why your screen would go black, unless its something like the camera plug.
Have you tried a simple message box?