We usually run validation on the pages, but I'll admit I haven't run them in a bit. I know when we did 5.0 we validated all the pages; but I haven't run them since.
Obviously we can't change issues with your
vB headers/footers; but if it's in the PP code we can clean it up.
Pretty much all of the index ones can be fixed by removing the </span> on the end of the lines with
lpostlink on it. (line 123, 216)