Created attachment 402126 [details, diff] diff -Naur jabref-2.10-r2.ebuild jabref-2.10-r3.ebuild This addresses issues with antlr:3 failing to compile per bug 506678. I will see about updating antlr 3.x to latest. In mean time this dep update for jabref fixes the issue in another way.
I have applied the patch to tree. Thanks!