The Startup Manager website is entirely w3c valid

Click a title to expand/contract the area

All the stylesheets are css 2.1 (and 3.0) valid

All the html documents are xhtml 1.1 valid

And all posts, archive pages and the search form are xhtml 1.1 valid too.

And so is this webpage

The syndication formats provided are valid too

References

• css 2.1
• css 3.0
• xhtml 1.1
• xhtml 2.0
• rss 2.0
• rss .92
• atom 0.3