[MapProxy] mapproxy with mapserver srs problem

[karsten]

the WMS request was mangled below so again it is 
http://terra2.terragis.net/cgi-bin/mapserv?map=/mnt/maps/vfs_mapproxytest.ma
p&LAYERS=gemeinde_merc&TRANSPARENT=TRUE&SERVICE=WMS&VERSION=1.1.1&REQUEST=Ge
tMap&STYLES=&FORMAT=image%2Fpng&SRS=EPSG%3A900913&BBOX=1160758.2358917,62265
44.0158282,1273273.5415119,6351442.1200288&WIDTH=736&HEIGHT=817

Karsten