We've been monitoring a growing thread on Apple's support discussion forums where users are complaining about their recently acquired Apple TV only outputting 480p after updating the OS to 4.1 last week. That's obviously a big step down from the 720p resolution touted at launch, and if the plight of these posters is indicative of anything, it seems the perpetrating update has somehow changed the HDMI resolution negotiation of the device -- which rears its ugly head in specific setups. Speaking of setups, though the issue was originally shared by a user who directly connected the device to their TV via HDMI, it appears the vast majority of posters are using an HDMI-to-DVI cable. This latter complaint offers an easy out for Cupertino since the Apple TV's fine print clearly states DVI isn't supported -- meaning if it worked perfectly with the previous OS, it was just a lucky coincidence. So how bout' it readers? Are any of you experiencing this issue with your shiny new hockey puck without involving DVI? Let us know in the comments below.