Sand Giants/Hill giants not seeing invis
 

They should

Got a source for that?

giants always saw through invis...

I remembered them seeing invis as well. It's easy to change if everyone is in agreement.

This has been discussed on the forums before:

http://www.project1999.org/forums/showthread.php?t=6297

I have never seen this before, nor do I remember them ever seeing invis and I used to hunt them a lot in RM and SRO FWIW.

This isn't meant to be snide or a jerk but I do have faith that maybe some of the devs have legit memories of classic 99 regarding simple things like this.

No proof = no change, otherwise precedent for changes based on anecdotal evidence is set, IMO

On Live, I remember as a rogue that Hide/Sneak fooled them. Not sure about caster invisibility, though.

Pretty sure they had a chance to see through invis. They didn't always see through it.