[Greasemonkey] foundInjectedScript is not defined

[WHITEMARE2]

Someone is using a script I created, but she is getting this error.  The script is installed and enabled, but won't run.  Many other people have used the script and it runs fine. She is running Firefox 1.5 and Greasemonkey 0.6.4 on Windows XP.  She's re-installed Greasemonkey and the script.  Any ideas how to fix this?  

Error: foundInjectedScript is not defined
Source File: chrome://greasemonkey/content/browser.js
Line: 400

thanks!