[Instiki] 500 Internal Server Error on Media Temple

[keiya at kanno.com]

Hello everyone,

I'm using Instiki on Media Temple's Grid-Server. It has Ruby on Rails
Container so I installed Instiki easily on the server. It works fine
most of the time but sometimes it suddenly shows "Status: 500 Internal
Server Error" and I have to restart the application. Do you have any
idea to fix this problem? Is this a Media Temple's problem or Instiki's
problem. I'm using version 0.11.0.