Ya. Seems like it would have been better if the implementation of variable-width fonts didn't goof and over-correct when presented with two spaces. As it is, they need to do something special when they see Mr. SoAndSo or Dr. SoAndSo, which would be, presumably, language-dependent. Then, everyone could always type two spaces after a sentence-ending period and it would always look good, regardless of whether it was rendered as fixed- or variable-width.
