That doesn't necessarily rule out anything. It really depends on the MP3s tested. If a few MP3s don't work for any reason then it's possible that certain people could have all their MP3 files with the specific properties that cause the issue or it could simply be indicative of a larger problem. Without being able to pinpoint the actual problem or see mIRC's source there's simply no way we can discount anything with what little information there is. Which means we need more info, or more specifically, the information I requested above from a selection of people.
