The igCombo control doesn't display correctly (the clear button and the dropdown button) when using with Bootstrap CSS. I haven't tested any other control but maybe this issue should be looked at? The code in Bootstrap 3.3.4 that seems to be causing the issue is in line 1072-1082:

* {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}
*:before,
*:after {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

Here is a JSFiddle showing the issue, http://jsfiddle.net/opo5wd7n/

Thanks,

Armando