It has been reported across many blogs that having the "Mybloglog" code in your html, might be slowing down the loading time of your blog. This is quite connected to the fact that the service has been terminated by Yahoo, earlier this year (2011).
If you added the MyBlogLog code to your blog when the service was still active, there is no more reason why you should still have the code in your blog's template, now that the service has been terminated. Delete the code so that your blog may load at better speed.
If you didn't add it to your html, you should not worry about it but if you are not sure, feel free to use CTRL F to scan your blog's html for the code.
So, how do I remove the code?
Login to your blog. Inside your html, use CTRL F to find : track.mybloglog.com
You will find it inside a code similar to the one below:
Delete the entire code and save your template.