Export only gives blank area

tried all export possibilities and only get a blank (gray/yellowish) area, like a background. The export-file never gets bigger than 4kb. Tried Mapnik and Osmarender with all image possibilites: JPG, PNG, SVG, PDF and PS. This is the area I tried to export: http://www.openstreetmap.org/?lat=47.38529&lon=8.5363&zoom=15&layers=B0FT
Anyone there who experience the same problem or maybe allready knows the answer to this?

I can export if I zoom in, does this work for you? And what browser do you use?

You have the bad luck to try this today. Every Wednesday morning the database is being dumped and reloaded with new data, that is why you had a blank map. Around 9:00 o 'clock GMT it is most of the times finished.

Oh yes, this was really bad luck. But thanks for this info, just 5 minutes ago it worked flawless.