content-type application/xhtml+xml vs. text/html

[Twilo]

Hallo,

Kalender (application/xhtml+xml)

ich verwende Opera 8.01, bekomme aber text/html

URL of main page:
http://www.derletztekick.com/calendar_js_oop.php
Encoding from server (used by Opera):
ISO-8859-1 (windows-1252)
MIME type from server:
text/html
Size of main page:
703 bytes
Number of inline elements:
3 ( 3)
Size of inline elements:
18974 bytes
Local cache file:
C:\Dokumente und Einstellungen\xxx\Anwendungsdaten\Opera\Opera 7.60 Beta\profile\cache4\opr0J7LM.htm
Security
Summary:

• not secure -

mfg
Twilo