Never seen that before.. Bizzare.
Usually, when SF wanders around without extruding, it's doing it for some temperature-related reason.. Either the Cool module is enabled and the layer is going to take less than the minimum time to complete or you've got Temperature settings that tell it you want different temps for different things and it's wasting the time until it thinks (based on the set cooling/heating rates) it will take to get to the right temperature.
1st guess would be something in Temperature. Try making a note of the cooling/heating rates that are in there now then changing them both to be 100.. If that doesn't solve the problem, change 'em back.
2nd guess would be that the STL is funky and it thinks it's doing support structures but you have the support flow set waaaay too low.
3rd guess would be Cool, but that's just because I have no other guesses.. This doesn't look like it's Cool-related.
Edited 1 time(s). Last edit at 10/12/2011 02:16PM by Dave Durant.