Index: trunk/wp-admin/includes/image.php
===================================================================
--- trunk/wp-admin/includes/image.php	(Revision 23185)
+++ trunk/wp-admin/includes/image.php	(Arbeitskopie)
@@ -82,19 +82,15 @@
 		global $_wp_additional_image_sizes;
 
 		foreach ( get_intermediate_image_sizes() as $s ) {
-			$sizes[$s] = array( 'width' => '', 'height' => '', 'crop' => false );
-			if ( isset( $_wp_additional_image_sizes[$s]['width'] ) )
-				$sizes[$s]['width'] = intval( $_wp_additional_image_sizes[$s]['width'] ); // For theme-added sizes
-			else
-				$sizes[$s]['width'] = get_option( "{$s}_size_w" ); // For default sizes set in options
-			if ( isset( $_wp_additional_image_sizes[$s]['height'] ) )
-				$sizes[$s]['height'] = intval( $_wp_additional_image_sizes[$s]['height'] ); // For theme-added sizes
-			else
-				$sizes[$s]['height'] = get_option( "{$s}_size_h" ); // For default sizes set in options
-			if ( isset( $_wp_additional_image_sizes[$s]['crop'] ) )
-				$sizes[$s]['crop'] = intval( $_wp_additional_image_sizes[$s]['crop'] ); // For theme-added sizes
-			else
-				$sizes[$s]['crop'] = get_option( "{$s}_crop" ); // For default sizes set in options
+			$sizes[ $s ] = array( 'width' => 0, 'height' => 0, 'crop' => false );
+			// For theme-added sizes
+			if ( isset( $_wp_additional_image_sizes[ $s ] ) ) {
+				$sizes[ $s ] = $_wp_additional_image_sizes[ $s ];
+			} else /* For default sizes set in options */ {
+				$sizes[ $s ]['width'] = intval( get_option( "{$s}_size_w" ) );
+				$sizes[ $s ]['height'] = intval( get_option( "{$s}_size_h" ) );
+				$sizes[ $s ]['crop'] = (bool) get_option( "{$s}_crop" );
+			}
 		}
 
 		$sizes = apply_filters( 'intermediate_image_sizes_advanced', $sizes );