That is SERIOUSLY AWESOME! Really, I can't help, any time I slice something, coming here and checking how it will be printed... Really, great work and huge thanks!
One thing that I'm noticing is, if I use G0 (the command for the rapid movements: http://reprap.org/wiki/G-code#G0:_Rapid_move)http://reprap.org/wiki/G-code#... for retractions, it looks like they're not showed (and I'm talking about both the red dot of the retraction and the green line of the subsequent travel move). Is that something known? Is there a plan to support it? I surely can provide some screenshots, g-code samples, or whatever you think it could be of help.
Thanks again for the amazing piece of software! :-D