Created attachment 277467 [details] emerge --info After upgrading gtk+ on ~amd64, starting session is nearly impossible. The X, gnome-panel and applet processes eat all of CPU. Reverting gtk+ to 2.24.4 fixes the problem. Looks like the cause is this commit http://git.gnome.org/browse/gtk+/commit/?h=gtk-2-24&id=254b9a4c540e3dff1dcd17db2ceea6a9fa5df973 Manually reverting it in 2.24.5 fixes the problem.
Reproduced
+*gtk+-2.24.5-r1 (18 Jun 2011) + + 18 Jun 2011; Pacho Ramos <pacho@gentoo.org> -gtk+-2.24.5.ebuild, + +gtk+-2.24.5-r1.ebuild, +files/gtk+-2.24.5-background-repaint.patch: + Revert commit that is causing major gnome-panel problems, bug #372147. Remove + broken version. +
*** Bug 372087 has been marked as a duplicate of this bug. ***
Will see what upstream does as this clearly affects to more distributions and openbsd