Wrong (000) UDF directory permissions with mkisofs

[Jan Henrik Sylvester]

I have created a DVD image (on 8.2-RELEASE/amd64 using cdrtools-3.00_1) with

mkisofs -R -J -udf -iso-level 3 -V NAME -o FILE.iso DIR/

(as described in the handbook), all files in DIR/ have 644 permission, 
all directories 755 permissions and all are owned by $USER:wheel.

When I mount the ISO-9660+Rockridge layout (mount_cd9660 -j), everything 
is fine: The files have 444 permissions and the directories 555.

Mounting the UDF layout (mount_udf), all files have 444 permissions, 
most (2795) directories have 555 permissions, but some (167) directories 
have 000 permissions and cannot be accessed by non-root users.

What went wrong and how can I fix it?

(I need the UDF layout, since some file names are truncated in the 
Joliet layout and the DVD will be used on Windows.)

Cheers,
Jan Henrik