I just saw this posed on Eqvault by Gordon Wrinn:

Lullaby Bugged?
[After reviewing some evidence posted on the thread] I spoke to Geoff about
the original author's tests. It looks like there might be *something*
strange going on, but we'll have to run some more tests in House. Geoff will
take another look at it after he gets done with the first draft of the
expansion spells in the next few days.

Well done everyone who posted evidence, they are at least taking another
look at this song.
I just hope they can un-nerf it as well as they nerfed it.

Bruen Bladesong
Erollisi Marr