I did not recommend you to upgrade right away, because we are going to release the new version of RichFaces 3.1.0 soon. The scheduled date is Sept 6.
RichFaces 3.1.0 in include Ajax4jsf codebase as well.
Ajax4jsf 1.1.1 does not contains the fix yet. So, it is no a surprise for me, it does not help. Just you my previous recommendation for now.
Ok, thank you very much, I'm waiting for the new release.
Thanks again, Sergey.