there is "500 Internal Server Error" while screenshot generates. Any issues with screenshot generator server? Also, there would be nice if script communicate with web server if query goes more then 30 seconds.
Not sure if there is any issue, got to wait for Mark. But one thing you can try is to disable all plugins except screenshots to make sure no other plugin is hindering it in some way ( doubt that ).
screenshot server is running fine. Error 500 is internal server error, most likely something in your hosting environment like mod_security. Your error log would reveal more information.
You MUST be running version 0.7. The old server used on 0.6 has been terminated.