Something ain't right here, let me explain
Hi, i brought just the oher day a Wireless-G Broadband Router with SpeedBooster - WRT54GS from PC World and under the router it say revision 5.1 so its the same as the OP
anyway i regged the product on Linksys website as per the leaflet says
www.linksys.com/registration and that automatically lists the right and latest firmware for the router BUT i didn't know it was for the USA model as nowhere in the readme does it say USA only or to goto the UK site for Uk firmware , so downloaded that one from the USA site - Firmware 1.50.8 updated my current firmware and all is ok, then i read this post, so checked on UK site and the firmware for mine list in the readme although my router is hardware version 5.1 (so choose version 5) that the latest firmware only compatible with hardware version 4?, lol
anyway all is OK using PC wireless, xbox360 hardwired and 2 DS connect wireless to play worldwide with no probs