Comment 7 for bug 597317

I've pushed a workaround for this bug, but it looks like it also exists in anything that uses GtkMessageDialog or GtkAboutDialog, so I'm not sure whether or not this is the intended behavior. My guess would be that it's not, since you can't do this in the file overwrite dialog in nautilus, but you can in the 'Slashes not allowed in filename' dialog. At the very least, it's inconsistent.