This following page is improperly aligned.
So, the Dialogue-Boxes appear off the main header.
This usually occurs when missing end Tags. 3thin.blogspot

This following blog seems perfectly fine.
It's functional. But, there's a missing thin layer on the webpage.
As a result, the background seems transparent.
not exactly a failed experiment. BUT, it shows how slight variations in TAGS can produce unusual results.
3x2method

Once again, this page looks great.
But, the blog archive should probably appear in the sidebar.
Instead, it's below the article.
3x3Method
these are a few things to watch for