I applied the latest update for Snapshot today and it caused a fatal error on a site. (I applied this update to about 15 sites and only one had the fatal error).
Fatal error: Class 'Snapshot_Helper_Utility' not found in /home/<accountfolder>/<sitefolder>/site/wp-content/plugins/snapshot/snapshot.php on line 161
I couldn't login into wp-admin with this error either.
To fix this I used FTP to rename the plugins/snapshot/ folder, so the site is now working. I then went to wp-admin/plugins page and it said there was an update for Snapshot (to 3.0.2). I ran this update and reactivated the plugin and it is now working fine.
But wanted to let you know in case others have this issue too. Any idea what could have caused this?