twitter/bootstrap — pull request #477 by lancehunt (2011-10-24 15:01:35+00:00)
Title: The naming conflict with clearfix still seems to be present.  Lets just rename it!

Renamed .clearfix() mixin to .clearfixEx() in order to fix issues with naming conflicts with.clearfix classes in the less (v1.1.4) parser when using node.js (v0.5.8) for windows.