twitter/bootstrap — pull request #6647 by GeoffYoung (2013-01-20 19:52:11+00:00)
Title: Set button text color and caret color in variables

This ensures that both will be the same color

If you don't want to add to variables.less for this then dropdowns.less should still be updated. As it stands ```.dropup .caret``` is black while everything else has been changed to white.