http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/eclass/qt4-r2.eclass?r1=1.14&r2=1.15 This breaks at least net-p2p/bitcoin-qt and x11-libs/qt-mobility
Sorry for the breakage... It should be fixed now, thanks for reporting!
Looks fixed to me. Reopen if I missed anything.