Today I checked the loading speeds of my site and blog.  Both are very fast, but I discovered a problem that could, and in some browsers does, slow down the site loading.  I found out that the references to images in my CSS files weren’t corrected, and since I have a custom 404 page for the blog, every single bad request loaded the 404 page.  This shouldn’t be a problem for smarter browsers, but it does take time for the browser to check those bad references, and in some cases it can cause recursive references to bad references.

So, be sure to check you’re CSS references and use services like Pingdom’s Full Page test: http://tools.pingdom.com/fpt/