It seems a little early to tell if this issue is widespread, but judging from the amount of tips we've received to go along with the growing complaints on the 'net, we're starting to wonder if we do indeed have a problem. Apparently, the Harry Potter and the Order of the Phoenix HD DVD has been problematic when used in the Xbox 360 HD DVD add-on, with quirks ranging from lockups to an outright lack of playback. It has been suggested that the non-combo version actually plays fine while the HD DVD / DVD combo iteration presents problems, leaving some to wonder if it's a format issue rather than the title itself. So, what say ye? Anyone experiencing these difficulties? If so, have you found a workaround / solution?