The ACID2 web browser CSS compliance test
Where HTML becomes proper XML
The front page currently validates as XHTML 1.0/Transitional. In particular I had to muck around with the gmap module and turn off the recent comments block. The former specifies a script tag with language but no type, and the latter has a <ul></ul> pair in it with no <li> tags in between, which is also not allowed. I will continue to work to keep this site as close to valid XHTML as I can, including submitting patches for drupal and modules.