Spent half an hour fighting my way down to the third level of one of the dungeons in Act II. Found the frog statue and started my way back to the surface, cleaning up Citadel Rangers, Mages, and Mutants along the way. Then I noticed that I was no longer receiving any experience points after each skirmish and apparently had not been since entering the dungeon. Confirmed this on the way back to the merchant camp when attacked by more mutants. Experience-o-meter did not change until I turned the frog statue over to its owner. Anybody else experience something like this?