Steps to reproduce:
On initial startup, when no previous preferences are stored in GConf, vinagre will crash with a GConf error because keys are not writeable.

These keys are touched on startup and are missing in the schema definition:
/apps/vinagre/side_pane_visible (bool)
/apps/vinagre/toolbar_visible (bool)
/apps/vinagre/side_panel_size (int)
/apps/vinagre/window_state (int)
/apps/vinagre/window_width (int)

Stack trace:
Breakpoint 1, vinagre_prefs_set_int (prefs=0x156b100, 
    key=0x425f43 "/apps/vinagre/window_width", value=650)
    at vinagre-prefs.c:137
137	{
(gdb) c
Continuing.
**
GConf:ERROR:gconf-client.c:1202:gconf_client_key_is_writable: assertion failed: (entry != NULL)



Other information: