I usually have TextMate 2 output LaTeX to Skim, but today, suddenly, LaTeX output appears in a split pane in the editor window. I've looked in the bundle preferences, where Viewing is still set to Skim and both "Show PDF automatically" and "Keep log window open" are checked.

This occurred in TM2 9307.

Downloading a nightly build has solved the problem, but I thought someone would like to know.