Notice:  entity "..." doesn't end in ';'

Cause:

This is a notice message, recommendation in HTML. And an real HTML error in XHTML.

Solution:

Add a ';' at the end of each entity.

Sample:

Entity "&nbsp" doesn't end in ';'

BAD :  Some &nsbp &nsbp spaces
GOOD:  Some &nsbp;&nsbp;spaces


References:

W3C: entities: http://www.w3.org/TR/html4/sgml/entities.html
W3C HTML: remark about ';' http://www.w3.org/TR/html4/charset.html#entities