XHTML Validator errors in website created with web presence builder

[brainforge]

http://validator.w3.org/check produced quite a number of errors / warnings.

Encoding: utf-8
Doctype: XHTML 1.0 Transitional
Root Element: html
Root Namespace: http://www.w3.org/1999/xhtml

end tag for "meta" omitted, but OMITTAG NO was specified
cannot generate system identifier for general entity "language"
reference to entity "language" for which no system identifier could be generated
required attribute "type" not specified