Pro 9000 Mk11 XPS Driver Behaviour

Just got Canon Pro 9000 Mk11 and all works fine using my own home Spyder3Print profile and normal IJ driver for colour managed workflow.

When attempting to use the XPS driver have run into the following problem:-

Print Preview shows correctly in CS5. However, using the Print module in Lightroom 3, 2 bands of 5 thin white lines appear across the preview screen. This does not happen with colour managed equivalent settings in Cs5. I have not printed this (am Scottish so never waste paper) in the hope that someone can explain.

Finding detailed info on use of XPS Print driver has eluded me in the manual so far.

I haven't tried the XPS driver, but, from everything I've read, it is suggested to turn preview OFF.

OK, I'll have a go at actual printing out of Lightroom3 (99% of my printing is done from there as, once you've got the settings correct, they are retained) but first just might try Lightroom Forum.

Anyone managed to compare output quality between the two drivers, assuming of course a good quality 16bit image?