Run your HTML file through od or some other tool that displays the numerical value of each character. My guess (possibly wrong) is that it's the non-breaking space character, which is not matched by \s (and shouldn't be, in my opinion).
Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

In reply to Re: When is a trailing space not a trailing space? by japhy
in thread When is a trailing space not a trailing space? by markguy

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