I was trying to make a page XHTML compatible when this message came up
Line 32 column 185: non SGML character number 146.I got 22 such errors.
MS Word was the culprit. The content for the page came from a doc typed by someone – God knows whom . I saved the doc as .txt and the the errors indicated by the XHTML validator turned into question marks.
FixedÂ them and the page is now
This Page Is Valid XHTML 1.0 Transitional!