Known issues and bugs
Issues
Extremely Slow Web browsing *Fixed*
Copplus 3.0.1 has an issue which makes some windows machines with a software firewall enabled Very slow to browse the web. (~20 seconds per page) This is caused by the dansguardian ident plugin being turned on by default, and the software firewall blocking ident lookups. Simple fix is to turn off your software firewall, or open port 113 inbound.
The "proper" fix is to turn off the ident plugin if you're not using ident to get usernames in your dansguardian logs. The Cop+ 3.0.1 GUI doesn't support this, but 3.0.2 does; in the "Advanced Configuration Options."
Fixed in Cop+ 3.0.2 -How to Upgrade?
Bugs
Web Browsing Fails
Sometimes web browsing breaks after installing Cop+ or after making changes to dansguardian. Usually restarting squid will fix the problem. Restart squid by going to the GUI page Services - Proxy and hit the "Save" button.
DG Config changes ignored *Fixed*
Copplus 3.0.1 has a bug which causes Dansguardian to sometimes ignore changes to the configuration files. The GUI editor for dansguardian config files inserts windows style line endings (a CR LF) which seems to sometimes (always?) cause DG to ignore that line. I think you can avoid this by never hitting the enter key while editing a config file.
Manual fix: Replace /home/httpd/cgi-bin/dansguardian/savefile.cgi with this new version. Make sure it's executable.
Fixed in Cop+ 3.0.2 -How to Upgrade?