Sorry about vagueness, was in a hurry. I do use a good assortment of mods alongside better HUD, I can reproduce it and watch the logs for anything that points to the error.
Edit: Okay....so this is very weird. I've re-enabled java 8 and I now see signs regardless. I'm not all that crazy :-/ Computer tech here myself....Love the "bring the issue here and it start working" terminology.