SuSe 11.1 on i586 processor
When attempting to update a locally compiled ROX-Filer (old) with AddApp the ImportError as above was reported.
The attached is the bug report produced by the zeroinstall system
Anonymous
zero install bug report
Looks like 0launch didn't download the ROX-Filer icon for some reason, and AddApp tried to use some old (no longer working) code to fetch it itself.
Does running this command show the icon?
$ 0launch -g http://rox.sourceforge.net/2005/interfaces/ROX-Filer
If so, AddApp should work after that. I've also fixed the code in the GIT repository.
What version of 0launch are you using (0launch --version)?