I dont need incremental backups, I use a simple script to rsync everything but the /home partition to a different HDD. Then I periodically create a DVD image from the backup with

#mount /dev/hdc1 /mnt # the partition containing the mirror of everything but /home
#mount /dev/hdc2 /media/data # the partition where DVD isos go
#genisoimage -o /media/data/root-image-2007-08-11.iso -R -A "Root Image 2007-08-11" /mnt

On February, when was last time I created such backup DVD, everything went well. Now it seems Debian has been intruducing deeper and deeper directory structures all over the place and this is what I get

#genisoimage -o /media/data/root-image-2007-08-11.iso -R -A "Root Image 2007-08-11" /mnt
genisoimage: Directories too deep for '/mnt/usr/include/c++/4.2/ext/pb_ds/detail/trie_policy' (7) max is 6.

and there are many more places like this. How can I overcome this - I assume - silly limitation of the Joliet FS ?