User authorization for Subversion doesn't work when the user belongs to several groups

I have been using Crowd integrated with Subversion for some time and everything has been fine, until now. I decided to add another group to the existing users and now Crowd authorization via CrowdAuthzSVNAccessFile doesn't work anymore (authentication is still fine) for users that belong to more than a group.

I have attached the Apache HTTPD Subversion configuration files. I have also attached an Apache error log, where you can clearly see the different result you get when a user only belongs to the 'subversion-h2h3' group (success) or belongs to both 'confluence' and 'subversion-h2h3' groups (failure).

The problem seems to lie in the Crowd Apache connector perl files. They somehow don't take into account the fact that a user may belong to more than a group.