So initially we deployed a pair of FTD's 4120's running 6.6.4.
We ran into an problem with limits to groups size as we have more than 100 entries in some of our groups. We had to split the groups, ( each group had not more that 100 in each).
Since upgrading to 6.6.4 we can add more to some of these groups.
Has anyone got any info on this as info from cisco as I cannot find or is unavailable.