2.10 fixed numerous bugs, such as a broken search feature with java 7 and version 2.6. Furthermore nearly all fetchers from 2.6 are unusable, because the websites have been updated. 2.10-r2 compiles fine here and works flawlessly. Reproducible: Always
@Till: Thank you for the report. Very helpful. Arch teams, please proceed.
+ 14 Jun 2015; Patrice Clement <monsieurp@gentoo.org> jabref-2.10-r2.ebuild: + Stable for amd64+x86 via ALLARCHES. Fix bug 524828. +