Comment 7 for bug 281047

I'm having the same problem. Could it be related to the "canberra-gtk-module" error that I get when I launch the page from a shell?

Terminal output:
$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=9.04
DISTRIB_CODENAME=jaunty
DISTRIB_DESCRIPTION="Ubuntu 9.04"

$ uname -a
Linux system76-pc 2.6.28-15-generic #49-Ubuntu SMP Tue Aug 18 19:25:34 UTC 2009 x86_64 GNU/Linux

$ apt-cache policy flashplugin-nonfree
flashplugin-nonfree:
  Installed: 10.0.32.18ubuntu0.9.04.1
  Candidate: 10.0.32.18ubuntu0.9.04.1
  Version table:
 *** 10.0.32.18ubuntu0.9.04.1 0
        500 http://us.archive.ubuntu.com jaunty-updates/multiverse Packages
        500 http://security.ubuntu.com jaunty-security/multiverse Packages
        100 /var/lib/dpkg/status
     10.0.22.87ubuntu2 0
        500 http://us.archive.ubuntu.com jaunty/multiverse Packages

$ firefox http://www.nbc.com/The_Office/video/episodes/#vid=1158372
Gtk-Message: Failed to load module "canberra-gtk-module": /usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so: wrong ELF class: ELFCLASS64

--
john