[trunk r.3775] Layout wrong in print-outs, PDF and Page Settings

Setup: trunk rev. 3775 under:
Ubuntu 10.04, Qt SDK 10.02 (Qt lib 4.6.2)
Windows XP w/ SP3, Qt SDK 2010.04 (Qt Creator 2.0.0, Qt lib 4.7.0)

Steps:
1) Open any score or create a sample score with just one instrument and default settings
2) Open the "Layout | Page Settings" dlg box

Result:
The Page Preview shows the score musical contents displaced waaaay to the lower part of the page.
MORE IMPORTANTLY, the same layout error occurs also in print-outs and in PDF's (generated with "Save as...").

Expected result: The layout is the same as in the main score view.

Thanks,

M.