I have a Sanyo PLV-1080HD I am getting sort of a pink color shift on the right side of the screen and yellow on the left. It’s a fairly new projector, less than 1 year old. Does anyone have any other causes in mind other than the polarizer? Sounds less likely for such a new projector.

This is exactly my woe:-
Slight pink-magenta cast in the middle brightness range and a slight unevenness in the white field, with subtle additional magenta tinges in various areas of the image, unnoticeable on color material, though they are visible if you look for them very carefully . I tried different sources with HDMI and YCBCR. The result is the same. Different color modes like the HDMI wide and YCBCR 4-2-2, YCBCR 4.4.4, RGB and the auto modes were used to configure, but with same results.

What this could be due to?
I use a sony blu ray player, the BDP S 370 with an HDMI in-out and that's it. No loose ends anywhere. Power line stable.
The test signal used to check the whites was from the 'LIFE' series blu ray from BBC where it carries a HI DEF set up as an extra. The whites had the magenta at about three points, all of them in varying intensty, but is evident only on close scrutiny. With this information in mind when you go to watch any programme material you can identify the magenta there. But for someone who hasn't seen the white test this magenta may escape him.
Can you kindly throw some light please?
The projector is just 100 lamp hours old.