window list expanding with number of windows open

hi,
i am refering to this post:
https://bugs.launchpad.net/ubuntu/+source/gnome-panel/+bug/157926
the problem is also described in the mailtitle.

i don't understand how this could be killed (especially why). what were 
the reasons?

i'd like to request this to be readded, what's the chance that this will 
happen?

thanks in advance, i really hope to get feedback on this.