This doesn't seem to be an urgent bug. I run a gnome warrior named Zimnaryba. The issue seems to be centered around an unpainted mechnostrider.
I cannot seem to mount while in Ironforge. Also, I was mounted when I logged into Stormwind. I couldn't get past the front gates, couldn't get into the griffon roost, and couldn't see my character. I tried hearthing, and I could see myself as soon as I dismounted.
