Edges are cut when printing from Swing Preview!?

Hello,
when I open my A6 report (297x420px) via a Java Application, the Swing Preview appears correctly. But now I'm not able to print without getting cut edges. Is this a printer problem or can sombody suggest any settings I may have missed?
When exporting as PDF printing works fine.. (but actually with displaced text fields - therefore see seperate thread)

THANKS!