Ragerin

A reinstall helped. I do not know what caused this problem, but I suspect some plugin.

Thank you for your help, castordor.

I am trying to reinstall my WordPress-installation now. Hopefully I just fubar’d something in the install and this will fix it.

Which would be the equivalent of:
chmod -r +644 *

Correct me if I am mistaken.

… which sadly doesn’t fix my issue.

The host does meet the requirements.

How would you suggest me to handle the file attributes? How do I know, what they should look like, without knowing about the internal workings of WordPress and/or this SimplePie (whatever it is)?

I am open to all suggestions. ??