#14 xhtml/css validation error

[lawrence]

Test against the http://validator.w3.org/ and found 267 errors. Most the errors mostly come from the hovertip css and probably other sections. In addition, the un-validated section come from the 'id' naming like 'Whole Face' where there is no space in within.

Suggest to put this under LOW priority because does not effect the gui of the site.