An error occurred: empty string for float()
  File "/data/www/apps.esdi-humboldt.cz/cgi-bin/tilecache-2.10/TileCache/Service.py", line 323, in cgiHandler
    format, image = service.dispatchRequest( params, path_info, req_method, host )
  File "/data/www/apps.esdi-humboldt.cz/cgi-bin/tilecache-2.10/TileCache/Service.py", line 181, in dispatchRequest
    tile = WMS(self).parse(params, path_info, host)
  File "/data/www/apps.esdi-humboldt.cz/cgi-bin/tilecache-2.10/TileCache/Services/WMS.py", line 19, in parse
    return self.getMap(param)
  File "/data/www/apps.esdi-humboldt.cz/cgi-bin/tilecache-2.10/TileCache/Services/WMS.py", line 22, in getMap
    bbox  = map(float, param["bbox"].split(","))