[MapProxy] Unicode support in layer names?

[Anders Sparre Jakobsen]

Hello List

I have a working Mapproxy 1.6.0 installation on Windows serving several WMS layers. I am now tasked with adding an extra WMS-layer which contain the non-english character Ø (Unicode: U+00D8, Html: Ø).
I have defined the layer in Mapproxy.yaml like this:

layers:
  - name: Other-objects
    title: Other objects
    sources: ['wms_trans:Øvrige_objekter']


When starting Mapproxy it quits immediately with the following information in the log:

2015-03-11 09:42:30,322 - INFO - mapproxy.config - reading: c:\mapproxy\mapproxy.yaml
2015-03-11 09:42:30,338 - WARNING - mapproxy.config - u'wms_trans:\xd8vrige_objekter' in layers[3].sources[0] not of type str
2015-03-11 09:42:30,338 - CRITICAL - mapproxy.config - invalid configuration

The Ø have been translated into \xd8. I have attempted to save mapproxy.yaml with ansi, utf8 and utf8-signature encodings, this does not seem to have an effect.
Since this is an external wms source, it is not possible to rename it. 
How can I make this work?

I have experimented a bit and it turns out Mapproxy is prevented from starting when using the character character in the name and sources options, but not in the Title.

Best regards,
Anders