I have the same problem: when trying to sort the images in a gallery, by no matter which criteria (unsorted, filename, asc, desc, …), and then click “update”, it always snaps back to “Unsorted – Ascending” and returns to a default sorting order, and it won’t save my custom order.
I personally feel that this is a pretty important issue and would appreciate any kind of feedback.
Thanks!
Oh yeah, I am using NextGEN 1.3.5 and this is how I upgraded from the previous version:
1.) upgraded to the newest WP version
2.) then disabled the NextGEN
3.) deleted the existing files in the ../plugins/nextgen/
4.) then copied the newest version to this folder
5.) and lastly activated the plugin once more
Everything seems to be working just fine except sort order.