I certainly haven't. (Is there a particular reason that you are asking? ie have you heard something?)

bjm8 wrote:
Has anyone ever had (or heard of) the GMAT scores on the Math and Verbal sections changing from the Unofficial report generated at the end of the test to the Official Report given ~ 1 month later?

NO.
your score never changes but %tile can change
i hv heard it.

edit: oops sorry suggested wrong link.

Thanks for the replies!

No, I haven't heard of this ever happening. The reason I ask is that I've been contacting B-schools, and they have been asking for GMAT scores prior to receiving my Offical Score Report. The last thing I'd want is to claim one score, and have the Official Report say something else. So I wanted to get some confidence that there wouldn't be any surprises when my Offical Report arrives.