From the help webpage -
http://www.blogger.com/howto/troubleshooting.pyraBlogger tags appearing on your blog
What it means: tags that aren't processed by Blogger for one reason or another show up on your site.
How to fix the problem: If you are seeing "<$BlogScript$> - value" on your site, then you are not using
remote editing, but the <$BlogScript$> tag was left in your template, and is no longer needed for anything. Simply delete the tag from your template to solve the problem. If you are seeing tags show up that say <$BlogDateHeaderDate$>, you have probably typed something incorrectly or forgotten to include <BlogDateHeader> and </BlogDateHeader> tags around the <$BlogDateHeaderDate$> tag in your template.
I hope that helps you, I have no idea what this means!
I think the help pages at blogger.com will help you more than me, although there are other people at lunarpages who use blogger who might also reply to this post.