Yes, that could be the problem.

However, I am not able to upgrade the program, as I am on a shared server (godaddy.com) and they don't allow uploading of blog software. They loaded serendipity on for me, and apparently they are using the old software.

In the meantime, I cannot fix this problem. Is ...

I just tried installing the static page plugin(1.5), unzipped them into the folders, and then went to admin to configure plugins, and my site glitched.

I get this error:
Fatal error: Call to undefined function: serendipity_walkrecursive() in /home/content/..../html/serendipity/plugins/serendipity ...

I did that originally, but it did not change all the necessary files, for instance the media library could not find images.

I got serendipity through godaddy.com and they loaded it in for me, but it has been placed in a subdirectory on my site called "serendipity" when I need it to be in a subdirectory with the name of my blog. I tried changing the name of the subdirectory manually, and through the administration options ...