[Plugin: Flickr Gallery] Thumbnails not displaying / Error message

Firstly, great plugin! However my page is being temperamental, sometimes it loads the thumbnails sometimes it doesn’t. Please observe…

Using the ‘Gallery’ shortcode
http://www.hypeon.tv/?page_id=24

Also I keep getting this error on Collections that pops up saying

Line 398 on Flickr-Gallery.php which is…
foreach( $collections[‘collections’][‘collection’] as $collection ) :

I’m no coding wizz so any help would be greatly appreciated 😀

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