Outdated Pidgin release (2.5.5), Yahoo bug still prominent

[Takyoji]

The Yahoo bug (making a user completely unable to use Yahoo in Pidgin)
is still existent. The Pidgin developers released a fix through version
2.5.7, 6 days ago, to resolve the bug. However this fix still hasn't
been released yet through mainstream Ubuntu releases; only Karmic, and
no others to my awareness.

Any reason why this vital fix hasn't gone mainstream yet?

From,
Takyoji (Caleb L)