Last modified: 2013-02-27 18:45:40 UTC
There are different favicons on one server - they should be the same though. Compare https://cs.wiktionary.org https://cs.wiktionary.org/w/api.php
Sounds like you need to clean your browser cache.
I did several times. Maybe it depends on the server serving the page. Because now I've got it correct. But few mins ago not.