When I click on "Quotas" in the "Firewall" section, the page starts loading, but the loading never finishes (even after 1 hour), and only the following is revealed (see the attachment please).
The problem was solved by resetting the router (wrt54gl), but some data were lost.
I hope that this problem will not happen again.
If anybody knows what causes such a problem, please tell me, because losing the data regularly (especially the quotas) will make this router useless for me.
This is a known issue with Beta5, and one of the reasons I made my latest news post -- I wanted everyone to know that quotas and access restrictions just got a major overhaul/improvement in the bleeding edge firmware.
I suspect you're using beta5, and your best bet is to just upgrade. If you ARE using the bleeding edge firmware, please ssh into the router and get the /etc/config/firewall file, and either post it here or PM me (some people prefer to send me a private message to protect their configuration for security reasons).