Before 3.5, there was a different highlight color in the Timeline for the clips located between an In/Out points and for the clips selected whilst in Segment mode. Purple and fushia. And it was extremely useful to spot which clips and/or which mode was active. 

Would it be possible to have that feature back in a next revision of MC? And if you want to improve it, the colors could be chosen in the Interface settings, so that we'd have the best of both world.

Asked for already:

http://community.avid.com/forums/t/74964.aspx

But it can't hurt to ask again, cuz this would be nice to get fixed.

adios,
Carl 

Oups I guess I didn't search enough before posting!

I like the old way of highlighting Timeline clips, though the suggestion in that thread is good too - except that red is already useful for offline clips.