i have troubles reading some cd-r written with windows.i don't know if it is because the cdrs were written with nero,but i can tell for sure that all cdrs which are unreadable were written with nero(windows).
i can mount the cd-r ,but konqueror shows me an empty folder.right-click on mounted cd, properties tells :
free disk space : 0b out of 672,6MB (100% used)
with shell, ls show the directories which are on the cd but i cant enter them :
ls: foo1 No such file or directory
ls: foo2 No such file or directory
ls: foo3 No such file or directory
i able to make an image of some of those cd-rs and loopmount them, but in the most cases this aint work.
on a windows-pc the cd-rs are readable!!!!
what can i do ??????

problem solved!!!
problem was that format in fstab was auto instead of iso9660.