HUD click problem

[Outcast]

I have a problem I have noticed that happens for me in Flash, I have not tested out other runtimes yet so it may be there to. When I have a scrolling game, and some HUD buttons it seems that if you click on the button you have to click on the right side (if the scrolling is moving right) for the click to register. This only get worse the faster the game is scrolling. Do anyone know a solution to this? It works flawlessly in exe as it should. I guess it must be something with how the frames are rendered so the click registers after the Hud button has "moved"?
I have attached the example file, but you can check it out in action here: http://www.varagtp.com/SwfTests/clickproblem.html
When you hover over the square it turns yellow, when you click the square turns blue. As you can see hovering works fine, but to register a click you have to click on the right side of the square.

[Outcast]

Hm after some more experimenting I found out that if you put in another condition in the click on object event it works. I just put in an always condition over the "click on square" condition (so the click on condition where not red anymore). But this seems like a very strange workaround to something like this? Is it possible to make a condition not red in any other way? (I assume the "bug" is happening because it is a red event? I dont really get why some events are red to be honest)