If you want to try the new beta version you can download here.
From the Mobbler Wiki:
We've added a few things (along with some bug fixes) that we'd specifically like you to test.
- Fix for radio on Nokia N8/Symbian^3
- Subscriber-only radio
- Share on Twitter
- Local events based on cell ID
- Better lyrics display
- Username limit increased from 15 -> 32 chars
- Better equaliser support
- Japanese, Korean, Portuguese and Ukrainian added and other languages updated
- Old scrobbles warning
- Play Mix Radio station
- Play Last.fm group radio station
- Play a custom lastfm:// radio station
- Removed discontinued Loved Tracks and Playlists radio station
- 20 volume steps where available (Symbian^3)
- Display subscriber's prestigious black icon
- Rejigged the Start a station menu
David Gilson for All About Symbian, 20th December 2010.