on kickstart install in ks.cfg, the --maxsize switch is ignored!! I've tested it twice, eg. /usr --size 600 --grow --maxsize 700 /opt --size 600 --grow will result in two identically big partitions :-( additionally, the DHCP timeout is too small, on my net you have to add it twice in the ks.cfg
Still happening in 6.1.92.
Issue will be resolved in the next cut of the installer made available.