THIS IS THE DIFFERENT DOMAIN Å¡.4a.si. click š.4a.si to go to the test site.

IDN bug in firefox. Note the domain of this document. Now click this link and observe the domain in the security popup. It's different.

the correct domain that should be displayed is š.4a.si, the domain that was incorrectly displayed is Å¡.4a.si. They are different domains and host different documents (click links and observe)

This is caused by incorrectly parsing UTF-8 as ISO-8859-2.