Hey, I have a problem which makes this modpack unplayable for me - Lots of chunks just doesn't load. It's like that server bug, where you just wander around and sometimes chunks doesn't load at all, but I'm playing SSP and it's like 30% of chunks doesn't load. It's just unplayable, and it happens on multiple worlds. Restarting MC does nothing. I have the same problem on DW20 pack. On Impact Flux I don't have this problem though.
I've added Optifine and Fastcraft to the pack (I have like 0 fps without them).