Chrome for Linux currently has some trouble playing HTML5 audio without occasional skips. (http://code.google.com/p/chromium/issues/detail?id=108396) Rdio's new interface doesn't use flash and instead uses this not-exactly-working API. Is there any way to revert to flash audio playback?
This should be fixed in future versions of Chrome, but at the moment Rdio is a nonstarter on Linux/Chrome.
Thanks for writing in. Rdio in Firefox should work a bit more smoothly for you. Have you already tried Firefox out?
Chrome 20 was just pushed to be the stable release and contains a fix. This can be closed.