Strange error messages from w3c 
Autor: Juergen S.
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Hi, I cannot understand the Errors listed by w3c.org when checking http://www.computertraining24.de/test/kurs-microsoft-excel-automatisierung-programmierung-vba-2003-2007-2010-2013-firmenschulung.html
read attached file please.
They are unusual html-errors, and the page-code is automatically generated. So I don't find the clue....
Do you have any idea how to start to work on this? 8:o/
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Hello Jurgen,
probably you have insert manually these metatag, and you have forgot the "/>" at the end, please remove your personal metatag and let the metatag inset by the program automatically.
Hope this help.
Autor
No, I didn't. should be something about the mobile-features, as far as I can see....
8:o/
Hello Jurgen,
this error:
…p-id=665879631, app-argument=http://www.computertraining24.de/x5feedready.xml">
is correct and notpenalizing, this particular tag for the apple store is not yet recognizedby the site.
The other errorsare caused byincorrectmetatags, try checkingifyou haveinsertedmanuallyin step 1in theexpert section orin other partsof the site.