Trivial version bump works fine for me. The library plays good with 2.4, but unfortunately the test suite doesn't (with statements; passes on 2.5-2.7 though). I've asked upstream but haven't gotten an answer yet. Add 2.4 to RESTRICT and its a go.
+*flask-babel-0.7 (08 Sep 2011) + + 08 Sep 2011; Rafael G. Martins <rafaelmartins@gentoo.org> + -flask-babel-0.6.ebuild, +flask-babel-0.7.ebuild: + Version bump. + Thanks Johan.
Oops... forgot your credits. fixed in changelog. sorry.