I always hated the abundance of blue in the T-Rex Jeep scene on the DVD and 2D BD releases. I'm certain it was never blue like that theatrically (based on 11 viewings albeit 22 years ago) and the 'Spielberg approved' 3D BD seems to confirm this as the blue is heavily reduced in this sequence.
Here's an example I posted previously to illustrate this along with a photograph of a 35mm film cell:
http://originaltrilogy.com/forum/topic.cfm/spoRv-projects-past-and-future/post/669332/#TopicPost669332
Personally, I'd love to see the 2D BD regraded to the 3D BD's colours or even some kind of happy medium if that's the consensus.