Versions 4.1.4 to 4.1.7 and 5.0.5

E007 Found '&' within 'href'. You should use '&amp' instead:

Error in ../blog/inc/users/model/_user.funcs.php
@version $Id: _user.funcs.php 9 2011-10-24 22:32:00Z fplanque $

Line 297 (Lines 234 and 535) on Version 5

$register_url = url_add_param( $register_url, 'redirect_to='.rawurlencode( url_rel_to_same_host( $redirect, $htsrv_url_sensitive ) ), '&' );

The last &amp was just an & before the hack

Versions 4.1.4 to 4.1.6

Validation error HTML E610 in the ../blog/plugins/_calendar.plugin.php
@version $Id: _calendar.plugin.php 9 2011-10-24 22:32:00Z fplanque $

E610 One or more of the following tags are missing from within the enclosing tag: <tbody>

added </tbody> to line 443
$this->tableend = '</tbody></table>';

See w3schools.com/tags/tag_tbody.asp