I have a WRT54GS v4. I went from Official Firmware 1.05.2 to dd-wrt.v23_mini_generic. After that I tried to upgrade to dd-wrt.v23_mini_wrt54gsv4 and it doesn't work. I just get 'Upgrade are failed.' Any ideas? I also cannot seem to revert back to the Official Linksys firmware. I get the same error. Is it not possible to go back? I'm a noob so please help.