1) No OGG support. Come on Microsoft, you can do it. I know you can. You were even willing to ( apparently ) pony up the money to include high bitrate mp3 encoding. You can't hire a contract/temp developer for like a month to add support for completely free and open codecs? This is really a non-starter for me. If your player doesn't support 1/3 of my music, i'm not going to be using it.

2) The "web video" problem. Ok, this one is a bit more complicated. I'm the kinda guy that plays music 24x7. Regardless of what else i'm doing, I want my music playing. So, ok, here's the scenario... I'm surfing... I click a video link... Now, the old behavior was horrible. It used to just completely blow out your current playlist and play the video. For v10, they "solved" this problem in a half-assed way. Now, your current playlist is saved, the music is paused, and the video plays. Sure, this means you can go back to your music after the video is done, but that's not the behavior I want. What I want is for the music to CONTINUE PLAYING while the video plays. And more than just complain about it, I'll offer a solution too. It seems to me that the right way to solve this is to allow the user to "pin" an instance of wmp. A pinned instance won't be reused by other applications which open media. So I could open one instance of wmp, get my music going, and pin that instance. Then if I want to view a video clip those will be opened in a new window. Unfortunately, since something like v7 of wmp, multiple instances of wmp has not been possible. So while this is the right answer, I doubt it will ever happen.

So anyway, until BOTH of these issues are fixed, it's winamp for me.