HP LaserJet P2055dn prints PDF's inverted

Hi,

I'm having a problem where PDFs are printing inverted from 10.6.1 from any of two new MacBook Pros or one MacBook Air in the office connected to a networked HP LaserJet P2055dn. The HP LaserJet P2055dn is connected to the computers wirelessly via a late model Apple Airport Extreme.

To reproduce the problem, I choose any PDF file where the background is white and the text is black and print from any of the above mentioned computers in the office and the output from the printer on paper is a black background with white text.

I have tried:

- Rebooting the computers, turning the printer on and off
- Changing the color matching between in-printer, and any number of profiles on the computer
- Saving the PDF in preview using a Quartz Filter for Black and White, Reduced File Size, Gray, etc
- Printing from Adobe Reader
- Changing the paper type in the print dialog box
- Changing output resolution (600dpi, 1200dpi, etc)
- Changing the output quality (draft, proof, etc)
- Going through the options menu on the printer itself (no obvious related settings to be found)

I have tried this with PDFs created using Fujitsu ScanSnap S1500m (the primary source for PDFs around the office) as well as PDFs coming from the eFax on-line service (the other typical source for PDFs around the office). Color documents with black text on white backgrounds authored in Apple's Pages program print correctly with black text on white backgrounds.

If I import any of the problem PDFs into Photoshop (forcing me to choose a specific pixel resolution and pick a specific page) the resulting image prints correctly (black text on a white background).

I have tried printing problem PDFs using Preview, Adobe Reader and PDF Pen.

My first thought was to update the printer drivers, but HP's customer support site says that there are no driver downloads for this printer for Snow Leopard because Snow Leopard ships with the latest drivers.

Any help would be appreciated, thanks!

Jeremy