I tried upgrading from 1.2.2 to 1.2.3 on another of the routers I'm in charge of with the usual backup/restore method and there was no problem using Firefox.
Be careful when upgrading with Safari as it unzips everything without you knowing it
Upgraded thanks ! I had a problem though but I got through it: - I backed up my 1.1.X configuration (don't remember which one, but kinda old) - Upgraded to 1.2.3 OK - Restored my conf: No more CSS in the web interface, unclickable buttons, rebooted: it was bricked. - Got 1.2.3 back via TFTP and spen...