Air contained between images is compressed and blows off parts of a line.
This may occur if:
Printing is done at high temperature or humidity
Using coated or other slippery paper
Printing line images at less than 5 mm (0.2 inches) intervals
To adjust the following settings, pre-register the type of paper in use as a custom paper. For details about registering custom papers, see "Registering a Custom Paper", Paper Settings.