I upgraded to ethereal-0.8.18-3 from Rawhide. It doesn't work -- when I run it, it exits immediately without putting up a window. I downgraded to ethereal-0.8.15-2, and that works.
The most current version works for me here, (ethereal-gnome-0.8.18-8 and ethereal-0.8.18-8)... If you have problems with that version as well please reopen this bug and provide the version numbers of the glibc and kernel you are using. Thanks, Read ya, Phil