I also had 3 x'es within the O's just after a reconfiguration + restart.
Restarted again with fingers crossed, only one x remaining, and I set the clock to low.
Re-restarted still with fingers crossed, all x'es went away, all O's.
Set the clock back to high, waited for 30 mins, still all O's. Phew!
I wonder if these issues are heat related. Anyone experienced it, added cooling and didn't happen again?
For me, my "x" didn't start until after a reconfiguration also. The first time it happened it was after the initial setup. Then today it happened when I switched pools. Both times I "fixed" it by changing the clock to low again, and possibly another reset (can't remember it was fixed after the reset or the change in clock). Then it works fine again on high.
The cooling setup is the same for this blade as my first, which has never displayed an "x" but also has firmware 0.2 (not sure if that's relevant or not).