There is one bug caught by WP Bug Tracker. It is in file media-selector.php, line 347 :
Undefined variable: mrelocator_plugin_URL
I believe the mrelocator_plugin_URL should be global.
In case you are interested in PHPSnapshot, shoot me an email on support (at) phpsnapshot.com. We can send you a report about bugs related to your plugin. It is free.
Hope this will make your plugin better,