Seconded.
I am using WP 3.2.1 and NGG 1.8.3 (manually checked that Alex’s latest code modifications are present).
However, my problem is not in the pagination itself, but it seems to be somehow depending on the number of gallery items. For the first ~5–12 items (depending on the position of the moon) alt text / description modification goes well and changes are saved, while the rest of the items remain unchanged. The text “Update successful!” is shown.
I have tried disabling other plugins and also tried to accomplish this with different browsers but no dice.
NGG is a very powerful plugin and I like its flexibility. I hope this gets fixed really soon.