I encountered awful trouble when I set this up.
I have xCache on my VPS already set up (and confirmed by my host)
I moved everything into the file-system i.e Avatars and the rest.
When I ran the test I got this -
And then I noticed I could not do anything in my admincp, I was very limited in my actions.
If I tried to uninstall I was left with either a blank screen or this 500 error
I wasn't able to turn off the hook system, and my host had to edit the config file (I think) to disable all plugins so we could un-install VB optimise.
Have you any idea why it would act like this? Is there perhaps a step if missed/done wrong, cause major problems like this?
Thanks for providing any answers and also for giving us all a plugin like this.