Fixing the Firewire stack issue
Currently there is a number of known problem with the firewire stack on Fedora 7. http://www.nabble.com/F7-kernel:-ieee1394-resurrection-t4253125.html provides a good overview of the problem and the relating issues.
To fix this issue, thereby allowing DV/HDV camcorders to work, simply follow these steps:
blacklist firewire_core
blacklist firewire_ohci
Reboot the system and now your firewire devices should hopefully work.