Just had the same problem too.
Everything works fine now that I downgraded to 2.0.66.37
Just to let you know there must be some kind of a bug somewhere.
Possibly the WPML pluging I updated this morning…
Thx,
Gery
PS: I do not use NextGEN in the front page slider, only in posts, e.g.:
https://www.intohistory.com/waleffe-castle/
