Comment 3 for bug 644348

Reproduce it this way:

1. With nautilus, mount a remote partition, so that you have it shown in the resources left pane
2. open firefox on http://commons.wikimedia.org/w/index.php?title=Special:Upload&uselang=ownwork
3. In the "source file" box click on browse: you'll be presented the upload file window

Now, in the upload file window you should see the mounted partition to, but you don't.