Customers using Netscape browsers are prompted continually to download and install a Java plug-in when browsing any CFML page containing the CFForm tag; the Java plug-in is required in any CFML page with the CFForm tag. The tag may fail to recognize that an appropriate plug-in HAS been installed. Here's a workaround:
ColdFusion 5: Netscape Browser Continues To Prompt User To Download Java Plug-in