Think you have just designed the best site in the world, love the way it works and how it looks?
click here and validate that HTML and see how good it really is :)
Have just run though some of my sites and am pleased to report that apart from missing the ALT tab on most of the images (lazy me!) its fairly clean code. Ran one though that I new was done in FP and have to say it came back with loads of errors. Dreamweaver does seem to have given better results.
of FrontPage - due for release this autumn - also has a nifty option to clean up code on the server. It runs through the server directories and 'optimises' the HTML, and so far I'm delighted with the results. Your local copy of a site stays as it is - so you need to run the optimiser when you update the site. It doesn't take long however, and it's just one of the little delights that are included in the new version.