So, I finally managed to get my blog’s new design to fully validate. Check it out. It took a little bit of combing through the code, but I managed to squash all the validation errors.
The most problematic of the errors was one caused by Blip.tv’s embed code. If you want to embed Blip.tv videos without breaking validation, simply find the part that says:
Cut those two little bits out of the embed code that Blip.tv gives you and you should have videos that work and complete validation.