[arch-releng] our core-dual images are too big

the size of core-dual iso has been over 700MB for a while. the last one is 738MB. See http://releng.archlinux.org/isos/2011.04.30/ what would be the best way to fix this? different archiso2dual parameters? different compression somewhere? revised packagelist? moving some packages out of core? [is anyone aware of noticeable size increases of the core repo or core packages?] Dieter