@Steven...
I hate to bring up an issue from last year that I though was resolved, but on MP3 tracks that I don't consider all that large, I'm seeing a 2-3 second lag between the wavebar current position and the actual sound. I've noticed this over the past 3-4 builds, but I can't imagine you did anything to change it. Currently on 3.3.6952.
If it turns out it's the best it can be, I'll have to live with it, but if some more tweaking can be done, that'd be great.
I'm going to PM a link to a track that, at least to me, it's quite apparent.
Thanks.