Error: Debian/Apache2/WebDAV - Permission denied: Could not open property database.
You use Apache2 with WebDAV on Debian and see this in Apache's error log (/var/log/apache2/error.log):
[Wed Jun 11 15:39:04 2008] [error] [client 192.168.0.46] (13)Permission denied: Could not open property database. [500, #1]
This means that /var/lock/apache2 is not owned by the Apache user (www-data on Debian). You can fix this problem by running:
chown www-data /var/lock/apache2