Hi Beemi,
I experienced a similar problem:
I developed time ago a vi in LV 5.1 that should print its panel progammatically, it worked perfectly both as a vi and as an .exe.
After updating to LV 6.0.2 and re-compiling the same vi with no-changes, the print-out gave only a blank sheet, no-one of the controls or indicators were printed and I got no error.
I had to re-build (building a new one)the same vi, with exactly the same panel and diagram in LV 6.0.2 and the printing was ok.
I actually could not figure-out what was the problem, consider that I had in my application very similar vis that could still print their panel after upgrading from LV 5.1 to 6.0.2...
Good luck,
Alberto