Comment 3 for bug 1005510

Almost certainly the old forkbomb bug:

https://bugzilla.gnome.org/show_bug.cgi?id=464111

There are two things different between nautilus & gedit versus grsync & gnome-terminal:

1) The former use the help: scheme, the latter ghelp:
2) The former use Mallard, the latter DocBook

Something is causing Yelp not to recognize these documents, which makes Yelp tell the system to open them, which in turn tells Yelp to open them, ad infinitum.