I think some of files in revision 50828 is not up to date. It could not compile successfully.
LineMode.Ellipse --- misspell as LineMode.Elipse cause value not valid
HilightedTextSprite call to "Invalidate" but mothod is not found (May be it's InvalidateData in TextSprite?
HilightedTextSprite overide to OnTextChanged, LayoutCharacters, PreRender but it not existed in base class.
It also miss the SetValues and/or Set for several Vector class.