user8192, we, too, have been seeing this issue for several days. Are you a Time Warner customer? Time Warner's DNS servers (209.18.47.61 and 209.18.47.62) intermittently return no such name when asked to resolve b.tile.openstreetmap.org and c.tile.openstreetmap.org. I do not see these failures when querying other DNS servers (e.g., Google Public DNS and Amazon DNS as well as OpenStreetMap's DNS servers). The issue only affects the Standard tiles since other tiles are served from other hostnames. We are complaining to Time Warner. *Update:* We complained to Time Warner about their DNS servers and now no longer see the problem, user8192. Let me know if you still see the issue and if you are a Time Warner customer.

user8192, we, too, have been seeing this issue for several days. Are you a Time Warner customer? Time Warner's DNS servers (209.18.47.61 and 209.18.47.62) intermittently return no such name when asked to resolve b.tile.openstreetmap.org and c.tile.openstreetmap.org. I do not see these failures when querying other DNS servers (e.g., Google Public DNS and Amazon DNS as well as OpenStreetMap's DNS servers). The issue only affects the Standard tiles since other tiles are served from other hostnames. We are complaining to Time Warner.