Thanks. They are all related to using Winamp to play rather obscure formats (Flash video and Univox streams - I had to look up the latter - and mp4 in a RAR when the user does something).
In short, none related to how people use Winamp: to play music files and streams.
Be sure to try QMMP if you haven't already. It's an actively-developed WinAmp clone. I found that I still like manual m3u playlist management better than the dynamic or db-driven stuff.