> 
> A bit hacky, but it should be possible quite easily.
> Can you test this ?

Works like a charm ;-)

> 
> My concern is that this will break with tgz or xml files that aren't
> in fact in the native format, but well, it would break anyway in such cases.

The problem lies in the fact that we should do more sanity checking while loading
a file. This is not a problem with _which_ files we can load.

> Need the same for saving ?

don't see why.

Just commited this.
-- 
Thomas Zander                                            zander@earthling.net
The only thing worse than failure is the fear of trying something new