Mine it's from Mexico and it's made during September 2006 and have cloud also. The issue happen on most of the 46'' of the XBR 2 and XBR 3. But when you take a look on the 40'' XBR 2 and XBR3. There's no cloud effect and the black it's very darker compare to 46'' and 52''.
I saw the KDL-46X2500 (The japanese version of the XBR) that one is very better compare want we have here. There is no clouding effect.
For those you got a chance to way till Feb. 2007. They might be happy. The LED version it's coming with HDMI 1.3, xvYCC at 36 bit colors.