I think you shouldn't worry. I can recall flying on tickets with at least 3 different spellings of my name and never faced any problem. Perhaps a written note from the res agent might help if something does happen.
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by whlinder:
Tomorrow my fiancee and I are flying UA on a reward ticket that my dad (MM) used his miles to reserve. Somehow United spelled my fiancee's last name wrong, replacing a P with a T. I called UA to try to change it but they said it had already been ticketed- thought the res agent did make a note in the system.
Should I have any problems at the airport?</font>