Rich Text Editor Scroll Bar

As you can see on this attachment a scroll bar is appearing when displaying a rich text edited field.  If I go in and remove a couple of lines of text the scroll bar goes away.  Does anyone know why this scroll bar is showing up?  It does not matter how big the area field is in it always shows up. For example, I can remove the last sentence and the bar goes away.  So it seems to be tied to a character count.