First I'd like to say that the new program loading interface is great - makes it way easier to access stuff.
However I've noticed a bug when using the interface in Windows 7 32-bit in Ableton Live8
basically if I click on a slider and drag it up and down for a certain length of time- say about 8 seconds or so - the window dissapears and I have to go back down to the bottom of Live8 and click the 'magnifying glass' icon which brings back up the Nebula interface.
Fortunately it doesnt effect the sound or plugin, it is still there. Also I tend to use automation for my Nebula programs so it doesnt bother me THAT much, however it can even happen when just trying to 'test' a program (i.e. slide a slider up and down a bit)
I have most of Aero stuff switched off so I dont think it's that - however I will try switching to total Windows Basic theme tonight and see if the problem still occurs.