openlayers/openlayers — pull request #283 by ahocevar (2012-03-05 13:24:09+00:00)
Title: New events: loaderror for Tile, tileerror for Layer.Grid.

With this event, users that previously used ```OpenLayers.Util.onImageLoadError``` now have an API way to handle tile loading errors with more than just a static background image.

The new events will also be useful for offline storage of tiles, to fall back from an online image to one from local storage.