Zone alarm will not allow you to download "YEnc" Encoded files, pictures, music or what not.
I've noticed no such restrictions. Are you sure you've got ZoneAlarm configured properly?
Absolutely. It is common knowledge on Usenet that the latest version of Zonealarm will not allow the decoding of YEnc encoded files. I have personal experience with this and have read many, many articles about it. I was unable to download YEnc encoded files for weeks until I did the research and switched. I've been using Agnitum firewall, the personal version is free and does not block YEnc.
The ZoneAlarm website does not address it nor would they reply to my Email requesting help. Just my opinion :)
Brian M.