I saw what is happening. The print finishes and the Z tries to go up, but the motors skip steps, like the speed or acceleration is too high.

The machine never skips steps anywhere else.

Recently my Pulse XE and MatterControl are leaving a big blob at the end of every print.

I have not caught it in the act, but it appears that the machine is pausing at the end of the print and oozing, extruding or melting some filament. I believe I have the latest versions of firmware and MatterControl.

Is there a slice setting that I messed up?