Canvas resize (Ctrl + / Ctrl -) only works via numpad keys

I'm using Win7-64bit and am unable to get the new canvas re-size feature to work. This is a long waited featured for me and I saw it in the release notes but am unable to get it to work.

When the focus is within the Editor I press the "Ctrl" and "+" but nothing happens. I've googled for others having this issue but don't find anything. I also looked in the preferences to see if I had to enable it but did not find anything.

What am I doing wrong, has anyone else seen this?

I'm using version 1.2.9 Build 104.