Okay so I "upgraded" to 11.04 natty narwhal and I've noticed that the login sound doesnt play. The drums played for the actual login screen and I was able to change that to what I wanted. The path I've set for the login sound should be fine. I went into "startup applications" and made sure that "GNOME Login Sound" is, in fact, checked so it should be playing. I tried restarting the computer with a .wav file as well as the .ogg file that was working just fine with 10.10. Any idea how I can change my login sound?

here's the path I have in my GNOME login sound edit options

usr/bin/canberra-gtk-play"secret" GNOME Login Sound

Sorry, I don't have Ubuntu anymore (replaced by Linux Mint), but perhaps it's a bug like described here in the comments:

http://www.liberiangeek.net/2011/04/...natty-narwhal/

or you have to give the path to the file like in this topic:

http://ubuntuforums.org/showthread.php?t=1546521

Good luck