I believe the hover issue at log-in, recently solved, inadvertently changed how wearing system shoes affect the sitting height.

This change makes all previously sitting z-axis adjustments (AVsitter) on countless furniture etc, completely useless !

I have a set of system shoes of varying heights, and I pick one that works for different mesh shoes. Think of it like a set of custom hover adjustments. This is desirable because system shoes gets saved with the outfit. As long as i have avatar hover at zero, all my outfits have a 'custom hover' for each of my mesh shoes.

To test this, sit on something and wear system shoes, you'll see the z-axis heigh change (assuming the system shoes have suitable height saved) - take them off and the sitting height reverts.

This change was inadvertent i believe, and should be rolled back/fixed.