Missing carets in bootstrap v3.3.4 in IE8

Created by: simonbengtsson

Bootstrap v3.3.4 made carets go missing in IE8. Here is a JSFiddle and here screenshots for IE8-IE10 (only IE8 is missing the caret). Reverting #15697 makes IE8 happily show carets again however.

In my projects I add a .legacy-ie class to the html element if <=IE9 so for me this can easily be fixed by adding this .legacy-ie .caret { border-top: @caret-width-base solid; }. However, I suppose bootstrap 3 supports IE8 and this should be fixed officially?