I reached the end of a turn, but the end-turn button simply stayed gray. I saved the game to send in this bug report, but once the game was saved, I got a window telling me that I had completed researching a spell. Once I had clicked OK, and then returned to the game, the end-of-turn button was now green.
It appeared to me that the magic resource report window failed to get focus as it should.
The savegame is in Dropbox, in case you can replicate the issue.
