For everyone asking about light, Hyperenergetic Nitor from Thaumcraft is a bit pricey, but more than worth it. Once you have it, just don't bother with any other light sources, you don't need them.
As to the reason I'm posting, I had used the unstable ingots from the cursed earth quest to craft myself a pair of Angel Wings. They'd been working fine and granting me flight for a long time, but suddenly today they just... stopped working. I then proceeded to accidentally kill myself by jumping into a quarry I'd made. I went into creative mode and replaced my wings, still didn't work. Even with 2 sets I can't fly and I still take fall damage. Pretty sure this wasn't an update causing the problem, since its been a few days since I updated, unless some patch came through that disabled it. Nothing else appears to be wrong with the game, just the wings aren't working.
If anyone has a solution or is experiencing similar problems, let me know.