[Plugin: Flickr Gallery] PHP Error

I have been using this plugin with success for manths now… and then today I get a PHP error:

Invalid argument supplied for foreach() on line 328

Here is my line 328:

foreach( $sets[‘photoset’] as $set ) :

ANy idea why this broke suddenly? Or how to fix it?

Thanks

Sue

http://wordpress.org/extend/plugins/flickr-gallery/