If you complete researching a new tech on the same turn as you complete the Spell of Making then the game starts to play the Spell of Making victory music but brings you to the new tech research screen. You can't exit from the tech screen.
I noticed this in 1.3 and I've had it again in 1.4.
Saved game at: https://www.dropbox.com/s/43hba4xkbtb5u5p/Spell%20of%20making%20bug.EleSav
If you switch to a new tech before ending the turn so that the two do not coincide then the game ends normally.
