tracker with USE=eds provides an in-process evolution plugin for indexing emails. Due to API changes in >=evolution-3.5.3, this plugin is completely broken. Upstream has started a new branch in git for updating the plugin, but at the monent, the work is not complete: http://git.gnome.org/browse/tracker/log/?h=evo-new-api If the plugin is not fixed by the time we are ready to unmask eds-3.6/evo-3.6, we will have to mask the eds USE flag for tracker.
> If the plugin is not fixed by the time we are ready to unmask > eds-3.6/evo-3.6, we will have to mask the eds USE flag for tracker. This is now preventing an upgrade to gnome-3.6, until the user disables eds support on tracker
(In reply to comment #1) Masked, thanks for the reminder. Unfortunately, it looks like tracker upstream has not yet finished the eds-3.6 porting. + 27 Dec 2012; Alexandre Rostovtsev <tetromino@gentoo.org> package.use.mask: + Mask tracker[eds] since gnome-3.6 has been unmasked (bug #436460).