Is this what's actually in the document?
<!DOCTYPE html PUBLIC "-//WSC//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-…
It's an incomplete document declaration. Should be
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
Don't know why that would have any effect on the table rows, they look fine.