Possibly the same firewall-related issue then, that was the only change since alpha 2 related to VPN.
You can delete the rule, however it will be re-added next time the firewall service gets restarted.
Code:iptables -D FORWARD -o eth0 ! -i br0 -j logdrop
(you might need to replace eth0 with ppp0 if using PPPoE).
Thanks! your workaround works I have made an adjustment in my custom script in /jffs/scripts so that it comes right after a reboot. I never restart the firewall by myself, so that should be fine.