This is fscking unacceptable. Yah, it's slick. All windows-esque. Whatever. I hate it. I'd like to be able to type my user name in, and not have a freaking list of enumerated accounts sitting there on my damn login window. Now get off my lawn *shakes cane*
Today, it finally annoyed me enough that I'd be willing to do whatever was needed to fix it. How about a real display manager?
In a terminal window, run:
$ sudo apt-get install xdm
You'll get a prompt. Select xdm.
Then, log off from your workstation, and hit Ctrl-alt-F1 to go to the text console. Log in with your user account and run the following commands to shut down gdm and start our new, tasty xdm.
$ sudo /etc/init.d/gdm stop
$ sudo /etc/init.d/xdm start
New, ugly but functional login screen. Yay.
By the way, the link to the Debian logo is buried in the xdm configuration file /etc/X11/xdm/Xresources. If you really want to change it, you can edit this config file and/or Bring out the Gimp and start crack-a-lacking.
fin.