CFCalendar Scrollbar Bug?

Okay, this one has me stumped.  I've developed a timeclock application and recently added a "request vacation" function for employees.  The form has two cfcalendar controls (one for begin date, one for end date).

On some of our employees IE browsers the controls render with both a vertical and horizontal scrollbar.  On others (using IE) - it renders fine.

It doesn't seem to matter what OS they are using (XP, Vista or 7) as at least one PC from each MS OS version is affected.  It also doesn't seem to matter if the user is using IE8 or 9.

In IE9 on my computer (Windows 7, 32bit) - the calendar renders with scrollbars in compatibility view, but not in normal view.  On others, the scrollbars appear whether or not they are in compatibility view, in IE 8 or IE 9

The controls render fine in Chrome and Firefox.

Here's the code:

<cfcalendar name="vbegin" value="#FORM.vbegin#" maxlength="11" required="yes" message="Please select a vacation begin date." startrange="01/01/1901" endrange="#dateadd('d',-1,now())#">

<cfcalendar name="vend" value="#FORM.vend#" maxlength="11" required="yes" message="Please select a vacation end date." startrange="01/01/1901" endrange="#now()#">

Here's a SS of the scrollbars mucking up the joint:

I've searched high and low and can't find anyone else with this problem, or (obviously) a solution.  Anyone out there got any ideas?  I've tried changing height, width via CSS with no effect.  Thanks!