I cannot reproduce the problem here, so to better monitoring this issue please submit a bug report in bug tracker.
Is this issue reproducible within Lazarus (right click TfrReport in form designer and select "design report")? or only in your program, if only in your program please attach to the bug report a sample report (if possible better a test project). Please find the ppd file of your printer in /etc/cups/ppd and attach it to bug report, don't forget to write down Lazarus version and revision