...I only know that there are beta versions up to .155. The last offical one is .112. ASUS always work on fw upgrades (more so compared some other makes). Toastman, RMerlin and Shibby upgrade every few weeks and you can contact them directly. I would suggest you take out a WNDR4500 and test it for your purposes. Maybe it does the trick on DLNA for you. If you can, test the RT-N66U concurrently. Remember to always unmount properly before switching off the router or disconnecting a drive.....