Vertical tabs (U+000B) are not allowed in XML documents. 

Char ::=
   #x9 | #xA | #xD |
   [#x20-#xD7FF] |
   [#xE000-#xFFFD] |
   [#x10000-#x10FFFF]

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I don't know why I get a different error from the two inputs in your example, but I do get an error from both.

Update: Just noticed you knew U+000B isn't allowed in XML, in which case I don't get the question.

In reply to Re: Vertical Tab (\x0b) in XML::LibXML by ikegami
in thread Vertical Tab (\x0b) in XML::LibXML by choroba

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