We unfortunately missed an issue in the 2.0.46 release but reverted the stable version of the plugin back to version 2.0.40 within minutes.
We had not believed this issue to be widespread but I feel it is best to write this short potential solution if you were one of those end-users who updated in that 15 minute time span.
First, this will only work for version 2.0.46:
- Go under Gallery > Other Options > Reset Options ... click the Reset button.
- Wait for the page to refresh then click the Save button.
- Now enter into your browser address bar your domain URL followed by
/?ngg_flush=1to clear all of the NextGEN Gallery caches (e.g.:
This should sort out the issue, if it does not you can try reverting back to version 2.0.40 and/or submit a Bug Report with your site specifics so we can further review this.