Hmmm, I just noticed this when I was trying to respond to another thread.
2010 definition of Flight Pass Activity
With the purchase of an eligible Flight Pass of 6, 8 or 10 flight credits (excludes Unlimited Flight Passes and Flight Passes for Business);
With every eligible 10 flight credits used in conjunction with a Flight Pass;
Per month for the duration of the travel period with the purchase of an eligible Unlimited Flight Pass.
And here is the 2011 definition
With the purchase of an eligible Flight Pass of 6, 8 or 10 flight credits (excludes Unlimited Flight Passes and Flight Passes for Business).
With every eligible 10 flight credits used in conjunction with a Flight Pass for Business.
Per month for the duration of the travel period with the purchase of an eligible Unlimited Flight Pass.
I really hope that this is a mistake. That is a very significant change and makes the U class flight passes even more useless. I didn't notice this anywhere else where changes were discussed.