Has anyone experienced issues when making config changes to their Draytek router? I've had issues when making firewall, NAT or VPN config changes and have experienced issues where NAT and firewall rules no longer work after saving the changes.

I then end up either having to restore a backup and today that appears to not have worked so I'm looking to apply the *.rst firmware and restore my last working config backup. From my tests it seems that certain versions of IE seem to cause the corruptions. Firefox seems to be mostly ok......

Just really frustrating and I'm considering purchasing an alternative router from another manufacturer!