As soon as I select "limit all", i get a server error.
All other pages are working fine. I increased my memory limit to 4 GB, checked file permissions, etc.
My error log just says Error 500.
My best guess is that it could be some kind of limited resources, cause I am working with configurable products (so for every configurable product there are 30 single products).
Edit: The error is: premature end of script. Turning of the cache works for me, however i still need to figure out how to solve it with cache turned on.