I am running 1.1.7 Stable, and I have noticed new behavior: Every once in a while, for some unknown reason, slic3r does not give me a continuous perimeter. It will draw part of the perimeter, then move elsewhere print a little bit, then come back to where it left off. I've seen it break the perimeter into 5 or 6 pieces doing this. Last night it did this in the middle of a bridge - totally ruining the perimeter of that bridge layer. The print completed and was usable, but I thought that was obviously a breakdown in the logic somewhere. To give be a non-continuous perimeter is one thing, but to stop a perimeter in mid-air expecting to come back and resume the print there is a bug.