Yes, that particular file has been mentioned to me before. The first two frames are 48kHz, whilst the rest is 44.1kHz. I have no idea why this might be. I thought at first they might be XING or VBRI headers, but they don't appear to be. I have no idea why MS would make a file like this. I've only seen something like it on one other occasion, where a file had one frame at 48kHz, and the rest at 44.1kHz. On that file it was actually album art being mistaken for a valid MP3 frame. A similar thing could be happening here I suppose. There could be a problem with the code that tries to jump over the ID3v2 tag.
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