SuperFish Menu sub-menu arrow styles

How do I change the style of the arrows on the Superfish menu? I can't find any styles anywhere but my layout stylesheet and it has nothing defining the arrows.

The second level menu has the sf-arrows class and it shows a down arrow vs. a right arrow like the third level. How can I change the arrow style for the second level to a right arrow?

HTML:

<ul class="sf-menu fixed" id="menu">
    <li class="current">
        <a href="index.html">Home</a>
    </li>
    <li>
        <a href="#">About us</a>
    </li>
    <li class="dropdown">
        <a href="#">Courses</a>
        <ul class="sf-arrows">
            <li class="dropdown">
                <a href="/courses">Classroom Courses</a>
                <ul>
                    <li class="dropdown wide">
                        <a href="/courses/CIC/">Certified Insurance Counselors (CIC)</a>
                        <ul>
                            <li><a href="/courses/CIC/cic_personal_lines">CIC Personal Lines</a></li>
                            <li><a href="/courses/CIC/commercial_casualty11">CIC Commercial Casualty</a></li>
                            <li><a href="/courses/CIC/commercial_property">CIC Commercial Property</a></li>
                            <li><a href="/courses/CIC/life_and_health">CIC Life &amp; Health</a></li>
                            <li><a href="/courses/CIC/agency_management">CIC Agency Management</a></li>
                        </ul>
                    </li>
                    <!-- MANY MORE ITEMS HERE -->
                </ul>
            </li>
            <li class="dropdown">
                <a href="#">Online Courses</a>
                <ul>
                    <li class="wide"><a href="/online_courses/self_study/self_study">Self-Paced Online Courses</a></li>
                    <li class="wide"><a href="/online_courses/online_classroom">Instructor-Led Online Courses</a></li>
                </ul>
            </li>
            <li>
                <a href="#">In-House Courses</a>
            </li>
        </ul>
    </li>
    <li>
        <a href="#">Schedule or Register</a>
    </li>

I've tested this on Superfish v 1.7.5.

This arrow is actually a border using opacity.

You just need to start it from the left instead of the top.

Replace in your superfish.css all the border-top for border-left. Examples:

border-top: 1px solid rgba(255,255,255,.5);

must be replaced with:

border-left: 1px solid rgba(255,255,255,.5);

Also

border-top-color: rgba(255,255,255,.5);

must be replace with:

border-left-color: rgba(255,255,255,.5);

I believe this shall change the arrow orientation. I've tested here and apparently it has worked.

Edit:

The selectors I've changed here for it to work:

.sf-menu a { 
    border-top: 1px solid #dFeEFF; /* fallback colour must use full shorthand */
    border-top: 1px solid rgba(255,255,255,.5);
}
.sf-arrows .sf-with-ul:after {
    border-top-color: #dFeEFF; /* edit this to suit design (no rgba in IE8) */
    border-top-color: rgba(255,255,255,.5); 
}
.sf-arrows > .sfHover > .sf-with-ul:after {
    border-top-color: white; /* IE8 fallback colour */
}