Not sure if this is due to my ATI video card but, this is a hassle of sorts not the end of the world but clearny not intended this way, i'll explain...
In some situations if I drop lets say the effects menu and move to stereo, all of a sudden half the menu will flicker and dissapear, then I have to start over, alot of the time I wont even see the menu but some times just see a plug or two, its glitchy.
A major area I see this happens is when things overlap each other, example: Open a synth, then open its preset list, if the preset list sits partly ontop of the synth all of a sudden some times, half the preset list will turn into the synths face though retaining the shape of the preset list
Its a pain, so I have gotten used to making sure nothing over laps each other so this doesnt happen, it doesnt do anything harmfull just a bit of an pain..
Cheers!