http://ftp.acc.umu.se/pub/GNOME/sources/gnumeric/1.2/ seems to have a gnumeric 1.2.6 (1.2.5 is mentioned as the latest release on their website).
Yeah i was working on this, lacking time to put it in yet. I'll try to do it asap.
*** Bug 41267 has been marked as a duplicate of this bug. ***
1.2.6 now in portage.