Absolutely no permissions on data DVDs

Hello,

data DVDs created using k3b 1.0.4 (also 1.0.3) show a strange behavior, that 
is, they have absolutely no permissions. When I mount the DVDs, I get the 
following permissions on my Linux and Macintosh machine:
d--------- 2 root root 736  4. Nov 23:09 dvd

I don't remember having changed anything on the settings for the disc 
filesystem or such. I already created some DVDs with these settings and they 
all worked like a charm. Using the k3b option to preserve the permissions for 
backup doesn't change anything either.
However, data CDs have correct permissions.

Are there some ideas what could cause this strange behavior and how to fix it?

Best greetings,
	Cedric

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