QUOTE(Antonski @ Jan 5 2008, 13:44)

Confirmed, tested with Winamp and Media Player Classic.
BTW, do you know if there is a way to see the tag data in Winamp (using it's native ds input plugin)?
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In DirectShow tags can be exposed using the IAMMediaContent interface - that's the way how windows media player reads them. But I'm not sure whether winamp uses this interface too.
In any case tags and IAMMediaContent is the next item on the TODO list of musepack filters.