Dear @Repetier it used to be a post regarding this, it seems that you cleaned everything,
i still have this problem,
as you already give me the clue (a G4 dwell command) on the gcode)
i still could not find why Slic3r is adding this commands every random line/position.
again here it is:
When Repetier 1.0.6 and slic3r 1.1.7 or 1.2.9 no trouble at all, (no pause commands on the gcode)
When Repetier 1.5.X and slic3r 1.1.7 or 1.2.9 pause/dwell command con the gcode...
cant find a solution....