When I print files from CS5 to our Cannon CLC 1550 I can duplex files set up and printed as 8.5 x 11 portrait with no problems. I can print booklet onto 11 x 17 with no problems. When I try to print landscape 8.5 x 11 files the first page of the file is shifted by 1p6 (.25") up on the 11" side. The second page of the file prints perfect. This happens both from the natice CS5 InDesign file and from the PDF created from it.
My work around has been to shift the images on the first page down by .25" so that it prints centered.
If it were the PPD I would think that all the files would be off. Printing from Windows XP on a network postscript printer. Cannon has not created any new PPDs for this machine as it is old (as our service tech is always telling us)