SINCE BLOGGER UPGRADED its template format from classic to the XML version, some users started having problems with ad codes - and that is a big trouble for profit blogs, right? Not being able to display that amazing ad due to weird errors that seem to come out of nowhere is not funny at all.

Usually, errors caused by ads scare the blogger with one of the following messages:

"Your template could not be parsed as it is not well-formed. Please make sure all XML elements are closed properly. XML error message: The processing instruction target matching “[xX][mM][lL]” is not allowed."

or

"Your template could not be parsed as it is not well-formed. Please make sure all XML elements are closed properly. XML error message: The content of elements must consist of well-formed character data or markup."