Warning removal in class2.php and I modified the theme.xml spec, so that one can specify exactly which version of XHTML and CSS the theme is compliant with. ie. true/false has been replaced with (Xhtml) 1.1, (Css) 2.1 etc. Pre-0.8 themes will default to this when 'true' is found.

e107_themes/_blank/theme.xml

@@ -2,7 +2,7 @@
 <e107Theme name="blank" version="0.1" date="2008-12-01" compatibility="0.8">
 	<author name ="Desislav Yosifov [SonicE]" email="support@free-source.net" url="http://free-source.net" />
 	<description>Blank e107 admin theme</description>
-	<compliance xhtml="true" css="true" />
+	<compliance xhtml="1.1" css="2.1" />
 
 	<layouts>
 		<layout name='default' title='3 Columns' preview='preview.jpg' previewFull='preview_full.png' default='true' >

e107_themes/e107v4a/theme.xml

@@ -2,7 +2,7 @@
 <e107Theme name="e107.v4" version="3.0" date="2003-06-11" compatibility="0.8">
 	<author name ="Steve Dunstan [jalist]" email="jalist@e107.org" url="http://e107.org" />
 	<description>Classic e107 theme</description>
-	<compliance xhtml="true" css="true" />
+	<compliance xhtml="1.1" css="2.1" />
 	<pluginOptions>
 		<plugin name='chatbox_menu' url='core' />
 		<plugin name='poll' url='core' />

e107_themes/jayya/theme.xml

@@ -2,7 +2,7 @@
 <e107Theme name="Jayya" version="2.0" date="2009-06-11" compatibility="0.8">
 	<author name ="e107Developers" email="security@e107.org" url="http://e107.org/" />
 	<description>Classic e107 theme</description>
-	<compliance xhtml="true" css="true" />
+	<compliance xhtml="1.1" css="2.1" />
  	<layouts>
 		<layout name='3_column' title='3 Columns' preview='preview.jpg' default='true' >
 		</layout>