It's beginning to sound like this problem is unique to the HP 5150.

Here are HP's exact words: "...the HP Deskjet 5150 printer does not support any colored paper. The only compatible paper is white HP papers."

We have put thousands of pages of "ivory" paper through it with no problems. Ivory is sort of an off white or light beige color.

Also, the paper we bought says on the package, "laser, inkjet, offset and copier guaranteed".

Bev and Jerry