I've been using ST for the past year and I absolutely love it. Since moving to ST3 I noticed I cannot close tags anymore. The shortcut "super-alt-." is triggering because the menu item lights up and i've double-checked its existence in the default .keymap file (my user keymap is empty). Additionally, when I try triggering it from Edit->Tag, it doesn't do anything either.
My installed packages are: Alignment, Emmet, Bracket Highlighter, Package Control, JSLint, SublimeCodeIntel, SublimeLinter, and Trailing Spaces.