[dchest]

From installation instructions:

Go into the /app folder and change the permissions on the _cache folder to be 777 (completely public).

[helipad]

I'm not sure what you mean by this? Are you suggesting it's insecure?

I thought lots of uploads/cache folders on blogging platforms have 777? I'm a lay person, indulge me.

[simonbrown]

See http://dionysopoulos.me/blog/777-the-number-of-the-beast