Index: wp-includes/cache.php
===================================================================
--- wp-includes/cache.php	(revision 13048)
+++ wp-includes/cache.php	(working copy)
@@ -238,7 +238,7 @@
 		if (empty ($group))
 			$group = 'default';
 
-		if (false !== $this->get($id, $group, false))
+		if (false !== $this->get($id, $group))
 			return false;
 
 		return $this->set($id, $data, $group, $expire);
@@ -266,7 +266,7 @@
 		if (empty ($group))
 			$group = 'default';
 
-		if (!$force && false === $this->get($id, $group, false))
+		if (!$force && false === $this->get($id, $group))
 			return false;
 
 		unset ($this->cache[$group][$id]);
@@ -343,7 +343,7 @@
 		if (empty ($group))
 			$group = 'default';
 
-		if (false === $this->get($id, $group, false))
+		if (false === $this->get($id, $group))
 			return false;
 
 		return $this->set($id, $data, $group, $expire);
Index: wp-app.php
===================================================================
--- wp-app.php	(revision 13048)
+++ wp-app.php	(working copy)
@@ -1580,7 +1580,7 @@
 			return false;
 
 		if ($match[3] == 'Z')
-			$match[3] == '+0000';
+			$match[3] = '+0000';
 
 		return strtotime($match[1] . " " . $match[2] . " " . $match[3]);
 	}