This is a weird one. I've played a THM/WHM up to lvl 43 and just got done Stone Vigil. I had lots of problems dodging Isgebind's AOE attacks. Turns out, after much yelling from my party, that I cannot see the AOE markers (the red circles and blue frosty things). Not only on Isgebind, but on ANY mob in the game. I can see all other effects, just not the AOE circles or cones. Up till now I got through because, as a healer, I didn't notice they weren't there.

Missing: AoE cones, circles and that little red circle with the arrow on mobs(just bosses?) that shows which way they're facing

Any ideas on what can be causing something like this?