Version: 2.2.0 (using KDE 4.3.3)
Installed from: Ubuntu Packages
If you open a radio station that updates its title (as the song continues on the next), this change is not reflected in the system tray icon tooltip.
My guess: is that the tooltip updates on progress wihtin the playlist entries ... but if the track info changes within a radio station (which is basically one playlist entry), the change is not reflected.
I am listening to Radio Swiss Classic now ... the station opened whilst playing Serenata Nocturne by Galuppi. The station has been on for a while now, and the tooltip still displays Galuppi ... while the station is playing Puccini now ;)
Update: I confirm the tooltip updates, but it is always one name-change late!
* Song a is playing
* name changed to Song b .... tooltip now updates to display "Song a"
* name changed to Song c .... tooltip now updates to display "Song b"
Not sure this is not already solved in 2.2.1
*** This bug has been marked as a duplicate of bug 211748 ***