Google decided to drop 32bit support for Chrome lately my Debian Jessie is giving me following errors when doing apt-get update
W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Release Unable to find expected entry 'main/binary-i386/Packages' in Release file (Wrong sources.list entry or malformed file)
To fix the issue you need to edit following file: /etc/apt/sources.list.d/google-chrome.list and change the line:
deb http://dl.google.com/linux/chrome/deb/ stable main
deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
Save your file and do normal apt-get update.
It seems that the change in google-chrome.list gets overwritten somehow, so I recommend you to set read only permissions on the file with:
chmod 444 /etc/apt/sources.list.d/google-chrome.list
Remember just next time if you need to modify this file to add write permissions back.