I agree that 100% XHTML compliance is a goal. The main goals of XHTML compliance (as I see it) are to make your site easier to manage, faster to load, more accessible, etc. All great things. With that in mind, I can vouch that I also get the same 5 validation errors on a vanilla install of DotNetNuke 5.0. Compare this to a vanilla install of previous versions and the improvement is dramatic. Things are getting better and I appreciate the progress that has been made.

Let's all agree that the end goal is 100% XHTML compliance, but we should also agree to not put *too much* emphasis on the little things we may or may not really understand in the meantime. In other words, if you're going to complain about the validator failling, you should at least understand exactly what each one of those validation errors mean and how they impact your site. I have it on good authority that these 5 errors are relatively trivial in the grand scheme of things.