Mike O said:
Wait, wait, wait, what's wrong with the Raiders BR? What've I missed?
Not much, but there was fiddling. The whole opening sequence was brightened and it did indeed "blow out" some bits here and there (the sky, for example). Not exactly terrible, except for the knowledge that it was a totally unnecessary change. Also the snake reflection (for Indy) is still removed, but other snake reflections (for Marion) are still there, so it's not the theatrical version a lot of people had hoped for.
Also there's some contention that the whole film now has a slight "golden" cast (and I agree with this). However, this golden cast is preferable to the weird bluish casts of previous home video releases, so it's still an improvement. Also, the sound is a surround upmix rather than the original, but I think it's a good surround upmix.
"Wrong" depends greatly on your point of view ;) It's been unnecessarily tinkered with, certainly, but it still looks and sounds good IMO, and taken as a whole it's better than all previous releases including HDTV (although HDTV may have a better opening sequence).