Subversion authorization with nested groups not working

Authorization in Subversion doesn't work if users are in nested groups. It works if they are directly in the "subversion" group that is mapped to the subversion application.

We are using the dav_svn.authz file to configure access like this:

1. Everyone has read access to the repository
2. (unless modified below).
   [/]

• = r

1. Members of the subversion crowd group can
2. read and write to the hole repository project
   [/]
   @subversion = rw

If users belong directly to group "subversion", they get access, but if they are in a nested group inside "subversion" group, authorization fails.