Unless I am missing something (I apologize if I have), select2 is not fully responsive. Look at this code:

    <div class="col-sm-6">
        <div class="form-group">
            <label>Submit to</label>
            <select class="form-control" id="SubmitQueue" name="SubmitQueue">
                <option value="1">Subsequent Civil</option>
                <option value="2">Subsequent Criminal</option>
                <option value="3">Judge Order - Civil</option>
                <option value="4">Review Sign</option>
                <option value="5">Subsequent Domestic Family</option>
                <option value="6">Judge Order - Criminal</option>
            </select>
        </div>
    </div>

The original select has 100% width from the form-control class. Select2 is creating a fixed width container. Thus, when I resize the window the select2 container does not resize as it should since the col-sm-6 class is a percentage.

So did I miss something in my initialization or is this an issue?

EDIT: OK. I looked throught the code and I noticed that the _resolveWidth doesn't even attempt to get a percentage width from CSS and only works with an inline style. I can live with that. How did it work in 3.5.2 without the inline style?