In R4.5, the icon for broken symlinks reverts to the icon used in days of yore, i.e. the bluish-purple fish. The problem is that the Tracker is overriding its own icon for some reason.If you prefer to see the more handsome R4 icon for broken symlinks (not that you should be seeing this very often anyway), do this:
Activate the FileType add-on on /boot/beos/system/Tracker (Ctrl+Alt+F), and scroll down to ‚Symbolic Link.‘ Then open the system’s FileTypes preferences panel and open application/Symbolic Link. Drag the icon from it’s icon well to the Tracker’s confused one to fix the fishiness.
Beware The Fish.