Index: wp-includes/rss.php
===================================================================
--- wp-includes/rss.php	(revision 8856)
+++ wp-includes/rss.php	(working copy)
@@ -37,6 +37,7 @@
 	var $inchannel			= false;
 	var $initem 			= false;
 	var $incontent			= false; // if in Atom <content mode="xml"> field
+	var $insource			= false; // if in Atom <source> field
 	var $intextinput		= false;
 	var $inimage 			= false;
 	var $current_field		= '';
@@ -153,6 +154,11 @@
 		}
 
 		# handle atom content constructs
+		# google reader fix: added 'source' handler to avoid detecting (and thus storing) 'title' again inside such blocks
+		elseif ( $this->feed_type == ATOM and $el == 'source' )
+		{
+			$this->insource = true;
+		}
 		elseif ( $this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) )
 		{
 			// avoid clashing w/ RSS mod_content
@@ -168,6 +174,8 @@
 		// if inside an Atom content construct (e.g. content or summary) field treat tags as text
 		elseif ($this->feed_type == ATOM and $this->incontent )
 		{
+			if (!$this->insource)		# google reader fix: don't mind anything from <source>
+			{
 			// if tags are inlined, then flatten
 			$attrs_str = join(' ',
 					array_map('map_attrs',
@@ -177,6 +185,7 @@
 			$this->append_content( "<$element $attrs_str>"  );
 
 			array_unshift( $this->stack, $el );
+			}
 		}
 
 		// Atom support many links per containging element.
@@ -185,6 +194,8 @@
 		//
 		elseif ($this->feed_type == ATOM and $el == 'link' )
 		{
+			if (!$this->insource)		# google reader fix: don't mind anything from <source>
+			{
 			if ( isset($attrs['rel']) and $attrs['rel'] == 'alternate' )
 			{
 				$link_el = 'link';
@@ -194,6 +205,7 @@
 			}
 
 			$this->append($link_el, $attrs['href']);
+			}
 		}
 		// set stack[0] to current element
 		else {
@@ -207,7 +219,10 @@
 
 		if ($this->feed_type == ATOM and $this->incontent)
 		{
-			$this->append_content( $text );
+			if (!$this->insource)		# google reader fix: don't mind anything from <source>
+			{
+				$this->append_content( $text );
+			}
 		}
 		else {
 			$current_el = join('_', array_reverse($this->stack));
@@ -240,9 +255,15 @@
 		{
 			$this->inchannel = false;
 		}
-		elseif ($this->feed_type == ATOM and $this->incontent  ) {
+		elseif ($this->feed_type == ATOM and $el == 'source')
+		{
+			$this->insource = false;
+		}
+		elseif ($this->feed_type == ATOM and $this->incontent ) {
 			// balance tags properly
 			// note:  i don't think this is actually neccessary
+			if (!$this->insource)		# google reader fix: don't mind anything from <source>
+			{
 			if ( $this->stack[0] == $el )
 			{
 				$this->append_content("</$el>");
@@ -252,6 +273,7 @@
 			}
 
 			array_shift( $this->stack );
+			}
 		}
 		else {
 			array_shift( $this->stack );
@@ -360,7 +382,11 @@
 
 	function is_atom() {
 		if ( $this->feed_type == ATOM ) {
-			return $this->feed_version;
+			# google reader fix: feed version may be blank
+			if ($this->feed_version)
+				return $this->feed_version;
+			else
+				return 1;
 		}
 		else {
 			return false;