Cronjob fails with: GLib-GObject-CRITICAL

[tdn]

Hi

I have this cronjob on my netbook:
http://paste.adora.dk/P2141.html

For some reason it always fails with this error:
http://paste.adora.dk/P2140.html

However, when I run the command manually as root, it works just fine.

What does the error mean?
How do I fix it?

Thanks.