I was able to look up the ticket that was filed and see that there is an updated file you can use to fix this problem if you are experiencing the same thing.
In your WA_iRite folder replace the fckutils.cfm file with this version that is attached. Before you do this you should make sure to save a copy of the file just in case you need to revert it.
Once you update this file make sure that the new file get's uploaded to the server. This should be an issue that is fixed in the latest release of FireFox but this updated file should get it working in the mean time. Note, this is a ColdFusion only issue, if you are not using ColdFusion you should not update this file.