I've set up a custom shortcut for Terminal to change tabs:
cmd+option+left/right (the same as in most browsers, for convenience).
I did this by going to
System Preferences > Keyboard > Shortcuts > App Shortcuts and adding it to Terminal as shortcuts for "Select Next Tab" and "Select Previous Tab". It worked perfectly.
Two days ago, I've upgraded to OS X Yosemite and now it's not working anymore. When I browse to the same location in System Preferences, it's configured. But it doesn't work.
How do I fix this, and more importantly, why is this happening?