Osmarenderer problem

It’s about one week that when I try to use osmarenderer here http://www.openstreetmap.org/?lat=45.4984&lon=9.1989&zoom=12&layers=0B00FTFT the rendering has some problem.
How can I check if there’s some error in data?

Thank you

One of the servers providing data to the Tiles@Home clients that render the osmarender layer seems to be giving out faulty data at present. If you request rerenders:
there is a good chance that they will be rerendered correctly (although there is a chance that until the faulty server is found and fixed that they may get rendered using that one - but if so request again and sooner or later things should sort look OK again).