As the title says.

Since the update, I have noticed a drop in frame rate of about 20 or so on worlds where the frame rate used to be up to 144 fps (max refresh rate).

Other random crashes seem to have increased significantly in frequency.

Prior to this, we had not experienced crashes in heavily loaded worlds or even in worlds with more than 20 users, so it is clearly not due to lack of performance.

Also, avatar culling does not seem to be having the correct effect.