Terminal CMD + SHIFT + Left/Right Brace No Longer Works
Edit: Disregard the first part. [ Is the shift of { so we were saying the same thing different ways. I'm leaving this here though regarding disabling the Mission Control shortcuts.

The sequence to cycle forward through tabs is ⌘+shift+}, despite what the Window menu says. (⌘+} switches between windows. Very odd.) And ⌘+shift+{ cycles backward.



(You should also be able to reclaim ⌘+1, ⌘+2, etc. to switch windows in Terminal, which is what the Window menu says those shortcuts do, by going to System Preferences > Keyboard and disabling the keyboard shortcuts that use cmd+ a number under Mission Control. I haven't tested this though.)