In a previous release of CF Builder there was a bug that some of you may have run into. The result of the bug was getting Eclipse pop-up errors when you tried to copy-n-paste with the keyboard shortcuts in cfm and cfc files. I entered a bug and it was fixed within a couple of days.
However after upgrading from the pre-release version to the latest public release, I will still getting the error. It was not until I blew away the .metadata\.plugins\org.eclipse.core.resources folder and started from scratch with my projects. So if your still hitting this issue or similar, please try this step to resolve it.