Along with the title once I morph it causes the world to no longer be playable, even with a restart. The problem only arose once I put shaders/optifine into the pack. It still crashes even with no shader pack selected.

Also the 2nd problem is it isn't really a "crash" so there's no log that I know of.

Once I remove optifine it all works fine.

I see that the 1.7.10 support has stopped.
But I think many people would appreciate the one last 1.7 fix c;