If the CD/DVD has been written with rock-ridge extensions, then it will (probably) have root as owner of all files. However, since ivman mounts this using "umask=007", only the root will be able to read these data. Possible solution: is there any way to "force" (override) user/group when mounting this type of media? I've tried to do "mount /media/hdd -o remount,umask=000" manually, after the media was mounted, but this did not change the permssions of /media/hdd directory. This was tried with ivman-0.6.12, and a data DVD I have burned with k3b (it was mounted as udf).
can you please ask the ivman upstream developers? I have no idea. Or write a patch yourself and submit it for inclusion please.