I've downloaded the windows version and tried to start Banshee.
Nothing happens.
I've monitored the Task Manager and seen Nereid.exe shows up for a brief second and disappear again.
I've tried repairing the installation but it had no effect (which makes sense because the fresh, first, installation had the same problem too).
I've tried running Munishee.exe instead of Nereid.exe (not sure what it is, actually) and got the output below.

Also a window popped up reporting "Encountered a Fatal Error"
Extension node not found path /Banshee/ServiceManager/Service


C:\PROGRA~1\Banshee\bin>Muinshee.exe
Logging to C:\Documents and Settings\Erez Segal\Application Data\banshee-1\log

(Muinshee:3864): Gtk-CRITICAL **: gtk_window_resize: assertion `width > 0' faile
d

(Muinshee:3864): Gtk-WARNING **: Error parsing gtk-icon-sizes string:
        'gtk-menu=16,16:gtk-small-toolbar=22,22:gtk-large-toolbar=22,22:gtk-butt
on=16,16:gtk-dnd=22,22:gtk-dialog:32,32'

(Muinshee:3864): Gdk-CRITICAL **: gdk_property_change: assertion `window != NULL
' failed

(Muinshee:3864): Gdk-CRITICAL **: gdk_property_change: assertion `window != NULL
' failed

(Muinshee:3864): Gdk-CRITICAL **: gdk_property_change: assertion `window != NULL
' failed

C:\PROGRA~1\Banshee\bin>