If you're using the OpenStreetMap map view, you should set ex:osmURL="http://tile.openstreetmap.org/${z}/${x}/${y}.png" on the OLMap(s) in your page. The original default URL built into the view (tah.openstreetmap.org) is no longer serving tiles; the tiles on tile.openstreetmap are also graphically different.
There are notices that you need to clear heavy use of tile.openstreetmap with its admins. You might want to consider running your own server / caching proxy. You can, of course, use whatever compliant tile server suits your needs best using the setting above. -- You received this message because you are subscribed to the Google Groups "SIMILE Widgets" group. To post to this group, send email to simile-widgets@googlegroups.com. To unsubscribe from this group, send email to simile-widgets+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/simile-widgets?hl=en.