Bizarre problem with 2 identical cards

Hi all,

Let me first give you my spec:

Intel Q9650
Asus Rampage Formula Motherboard
8GB Corsair DDR2 800 RAM
2 x Sapphire Radeon 4870 1GB (Identical clocks, but one has TOXIC cooler, problem card has standard cooler. Both run cool)
3 x Dell 2408WFP (One powered by primary card, other two on secondary card, no crossfire)

Ok, so here's the deal: I run one eve-online account on each screen, at 1920 x 1200. Until today, all worked perfectly; beautiful graphis across the board. However, today one of my monitors wasnt receiving any signal (one of the secondaries). It knew it was connected, just told me no signal was being sent. I played around with the DVI connectors, and it began working again.

Since then, maybe coincidentally, the two eve clients on the secondary monitors look rubbish. They are sharp, but it seems that for some reason the card has decided to use the lowest possible textures. See screenie: rubbish on left, good on right. Same station.

http://dl.eve-files.com/media/0904/problem_1.jpg

The graphics settings are identical:

http://dl.eve-files.com/media/0904/problem_2.jpg

I logged into each account on different screens, and the rubbish graphics stay with the EVE install thats set to each screen, not with the game account.

I have updated my drivers to the latest. No change.

Any ideas? This is a weird one!

Have you got anything in the Catalyst center which forces the quality down or something? Does it happen in other games?

Turned catalyst AI off?