Going against the grain, I guess. I like them, more or less. I particularly like the color-coding in the newsfeed.

However, I generally favor text options: if there was a no-icon option I'd probably choose that over icons.

My nits:

Advanced search looks like a settings icon, though.

Admin-tools doesn't seem to relate. (A 60s rocket ship? huh?)

Notification looks like an A with some sound at small resolution instead of the radio tower.