latest nerws is that DELL have a new firmware in testing right now that fixes the grany sRGB AdobeRGB issues, the firmware has not been released yet but in any case is NOT something you can do at home, you need to sent the monitor back to DELL, or ask for a replacement. As I said the firmware has not been released yet, I think you may have to wait a couple of months for DELL to get rid of the current stock and for monitors with the revised firmware start making it into the channel.
I think I am going to wait until next feb/march before buying the U2410.
As much as I like this monitor I can't afford to waste time in ordering, find that my unit has the TINT issue/grainy issue, send it back 1-2-3-4-5 times hoping to get a good unit. Especially not after ordering and sending back both a W2248h HP and a LP2475w (both rubbish units by the way..never buy HP ever again!)