I have a library with metadata navigation. When anonymous users go to a navigation link, the web browser gives the 403 forbidden error. The error disappears when I turn off metadata navigation.
To display I'm using library default list form with Xslt List View Web Part.
I found msdn article about the same topic. I granted permissions to application pool and it has no effect.
Logs tell me very informative strings: Unknown SPRequest error occurred. More information: 0x80070005