Hi, all-

It's been so long since I've had any trouble with Ubuntu that I can't figure out how to get around this one...

When I try to update everything (sudo apt-get update), I get the usual pings, followed by the following messages:

Code:
Reading package lists... Done
W: Duplicate sources.list entry http://dl.google.com/linux/chrome/deb/ stable/main amd64 Packages (/var/lib/apt/lists/dl.google.com_linux_chrome_deb_dists_stable_main_binary-amd64_Packages)
W: Duplicate sources.list entry http://dl.google.com/linux/chrome/deb/ stable/main i386 Packages (/var/lib/apt/lists/dl.google.com_linux_chrome_deb_dists_stable_main_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems
Any idea how to fix this? I can't find the good old "Software Sources", the Software Center is no help, and peeking at /etc/apt/sources.list, there's no mention of these PPAs anywhere, just the stock Ubuntu sources.

Thanks in advance for any light you can shed!

-Mark