I have a WRT54G v4. I attempted to flash from whatever firmware it shipped with to the HyperWRT firmware. I later decided I wanted to switch back to the default firmware (I used the most recent version). The flash succeeded, but now I have the corrupted GUI like what some people with the v5 router have. TFTP will not work, unless I try reflashing with the exact same firmware that's already on the router. In that case, it succeeds but I'm still stuck with the corrupted GUI. Help!