Why is this required so often when using webassist extensions? It seems that this is the first answer to many error messages. The css menu writer was working fine, I made that one tiny change that you suggested (changing z-index: 100; to z-index: -1;) and then I have to delete the dat file. I had to do this same thing when I ran into an error with the form builder also. It's obviously so common, that you have it listed at the top of this page as a notice.