I did some more debugging on this issue. The failure stems from the call to wxExecute(...) in PanoPanel::DoStitch(). Due to something that looks like a wxWidgets bug (I can replicate it in the wxWidgets sample), arguments with non-ascii characters get dropped, resulting in bad arguments to hugin_stitch_project.
The solution would either be to replace the call to wxExecute, or wait for wxWidgets to fix it.
I did some more debugging on this issue. The failure stems from the call to wxExecute(...) in PanoPanel: :DoStitch( ). Due to something that looks like a wxWidgets bug (I can replicate it in the wxWidgets sample), arguments with non-ascii characters get dropped, resulting in bad arguments to hugin_stitch_ project.
The solution would either be to replace the call to wxExecute, or wait for wxWidgets to fix it.