DrillingInfo/openlayers — pull request #1 by clark-archer (2012-06-15 21:41:16+00:00)
Title: mostly fix missing tile errors

Simplistic approach to fixing part of the missing tile errors. This takes care of the case where the image is not reloaded, such as when adding a layer back to the map. This does not fix the overall issue where the olImageError class is not properly added to all bad tiles' tags, but it does fix most visual errors except when the user clicks the zoom-out control very quickly.