https://bugs.freedesktop.org/show_bug.cgi?id=73528
--- Comment #44 from MirceaKitsune sonichedgehog_hyperblast00@yahoo.com --- Uh... that news makes me a bit uncomfortable. I can't currently compile latest GIT master of MESA on openSUSE Tumbleweed, so I can't test if the problem doesn't return because of it. I'll wait for the relevant system packages to update and test the problematic shaders again, then post another update here.
Have you ran Second Life with Deferred Lighting enabled, EoD? It does require an account to log in, so if you don't use it regularly it's understandable if you can't. Would have liked knowing your results until I can test the new commit myself though.