The same problem here, publishing to iOS with Flash Professional CS5.5 and AIR 3.1.
Is it solved with AIR 3.2?
Thanks in advance,
Double check the font you are using. I had the same issue with 3.1. Come to find out the astericks wasn't included in the font I was trying to use ( Helvetica purchesed from Adobe ).
Embeded Helvtica purchased from Adobe.