In a specific group of fonts the underlining feature underlines beyond the end
of the line and cannot be turned off.  The point size does not seem to matter. 
Some of these fonts are Estrangelo Edessa, Gautami, Latha, Mangal, MV Boli,
Raavi, and Shruti.  A paragraph containing underlining can be changed into and
out of these fonts and the error will go away for other fonts such as Times New
Roman or Gothic and will return for the above fonts.  The length of the original
underlined portion will determine the overage of the extra underlining.