User blog comment:DabbidyDab/V3 Chapter 1: Oobleck's New Eyes and Other Things/@comment-4010415-20151026101121

Yeah, I noticed Oobleck's eye color change, too, and it's in his trivia section, if I remember correctly. You're exactly right: They were brown in volumes 1 and 2, and now they're blue. I'm not sure if this is something we should be suspicious of, or if the RWBY crew just thought he'd look better with blue eyes.

Then again, Monty did once say that eyes are important in this show, and when an eye color changes, there's a meaning behind it. Maybe Oobleck is using his Semblance, whatever it may be. I do find it kind of suspicious that they had him lower his glasses twice so we could see his eyes.

Buuut it could also be nothing.

Also, Port has wrinkles now.