My latest one is a D500, was a coupla weeks old when I bought it from EBay.
Had it 2 months and it's back at Samsung under an "In Warranty Repair".
The screen went very bright, colours looked washed out, and couldn't make out text on screen.
All other functions were OK.
Dunno if it's a common fault, as at the mo' I couldn't find much on the net about it.
Other than that "Glitch", a nice phone...call clarity excellent.
Could do with ALL tones being customisable, Alarm & txt tones are bog standard poly's.
Battery life not very good.
Great phone for just shoving in your pocket on a night out.
I also have a P800, P900, 6600, but the D500 wins on pure portability
Photo Quality great, but not a patch on the Mrs's K750, which will be my next one