Ok, this is a minor arguement I started on the GW boards, so I'll bring it here and see what the concensus is. I think this will need an FAQ ruling as it really can go either way, but here goes....
Are lash whips a cumulative effect? In the 3rd ed codex it had a small footnote on the weapon chart that it was not a cumulative effect. That does not appear in the 4th ed. codex and the wording in the new codex leaves it open to interpretation either way. GW is very good at saying, "this effect is not cumulative" for most things that they don't want to be a cumulative effect, but they are not so good at saying when something is a cumulative effect. So my thinking is that they are now cumulative. If you have 3 Tyrant Guard with Lash Whips and they come base to base with a Master of Sanctity (for example), the Master of Sanctity would drop 3 attacks to a minimum of one attack. Anyone else got any feedback on this issue?