Wow mate, you could put that in one reply :)
Well anyway... I don't have anything here with IPMI.
I'd never even notice that actually, but I was playing with an old server in the lab and since it's a heavy piece I went the lazy way, connecting it wit...
It seems that "Wireless Isolation:(between SSID)" is actually acting as "Wireless Isolation:(within SSID)"
When both are disabled I have no issues.
So looks like a bug to me.