twitter/bootstrap — pull request #741 by tinyfly (2011-12-01 21:19:56+00:00)
Title: reinstate grid row and span* styles for 768-940 removed for 480-768

iPad in portrait applies both the 480-768 and 768-940 media queries this results in a half grid/half linear wonky layout. The .row and .span* classes are linearized in the 480-768 block. I'm adding those grid styles back in for the 768-940 block.