siwiki shows a favicon style that is normally used by wiktionaries (defined at wgFavicon):
http://upload.wikimedia.org/wikipedia/favicon-si.ico
and siwiktionary is using the wikipedia standard favicon (showing a "W"):
http://si.wiktionary.org/favicon.ico
I think that layout should be swapped.
Version: unspecified
Severity: minor
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=32825