In 1.6.2 (and as low as the snapshots) me and my friends get major lag. I use to get 60-70 frames with Optifine on Fancy graphics, clouds on, and normal render distance.

Now in 1.6+, I get 7-30 frames with Optifine on Fast graphics, clouds off, and normal render distance.

This is literally making 1.6.1 unplayable for us. On all the other bug reports about major lag it says resolved. Were still having a major lag problem.