Index: wp-admin/includes/template.php
===================================================================
--- wp-admin/includes/template.php	(revision 18190)
+++ wp-admin/includes/template.php	(working copy)
@@ -779,23 +779,20 @@
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Convert a human readable (hr) memory setting value as in 
+ * php.ini into the number of bytes (Shorthand Notation).
  *
  * @since 2.3.0
  *
- * @param unknown_type $size
- * @return unknown
+ * @param string $size memory setting value
+ * @return float bytes
  */
 function wp_convert_hr_to_bytes( $size ) {
-	$size = strtolower($size);
-	$bytes = (int) $size;
-	if ( strpos($size, 'k') !== false )
-		$bytes = intval($size) * 1024;
-	elseif ( strpos($size, 'm') !== false )
-		$bytes = intval($size) * 1024 * 1024;
-	elseif ( strpos($size, 'g') !== false )
-		$bytes = intval($size) * 1024 * 1024 * 1024;
-	return $bytes;
+	$bytes = (float) $size;
+	$last = strtolower( substr( $size, -1 ) );
+	$pos = strpos( ' kmg', $last , 1);
+	if ( $pos ) $bytes *= pow( 1024, $pos);
+	return round( $bytes );
 }
 
 /**