Mouse problems: VST on Mac

Check this short video out from one of the beta testers. There are two problems:

  1. the tooltip appearing way off the right location (25 seconds in), and 
  2. the mouse-over on the button not being removed after the mouse moves away from the button (18 seconds in).  

http://www.credland.net/mouseoverproblem.mov

The letters on are being highlighted using the isMouseOver feature of paintButton(..).  It's very simple code.  

The problem only affects the VST build (2.4) on the Mac.   I haven't tried VST3 yet.  It doesn't affect the PC or the audio unit build. 

I've also hit a similar problem with dragging files out of the VST mac plugin where the mouseup isn't being spotted.  Though I have an ugly work-around in for that at the moment. 

Has anyone else seen unusual behaviour with mouse handling in VST2 on the Mac? 

This might be an ableton issue on further investigation...!