Under havok 4, the height the avatar can jump to is massively decreased. For reference, by jump, I mean tapping the e or PGUP key without holding it down. This is a problem, as it breaks a lot of content. The Jump animation in my AO, fdor instance, is designed arounmd the avatar jump height, so that I spin gracefully in the air and land on my feet. Under H4, I hit the ground mid-spn. This also causes problems for any area which uses jumping. Obstacle courses, and such. Which are based around the avatar's capabilities and adjusted to match. Please fix this soon. Edit: statistics. I used the script detailed below to obtain these results. Havok 4: [8:16] Object: Jump height was: 2.803389 [8:16] Object: Jump height was: 2.813299 [8:17] Object: Jump height was: 2.804680 approximately 2.8 metres. havok 1: [8:20] Object: Jump height was: 3.964437 [8:20] Object: Jump height was: 3.969215 [8:20] Object: Jump height was: 3.969231 approximately 3.96 A loss of over 1 metre in jump height. //------------------------------------------------------------------- vector x; float starting_height; float highest_height; float current_height; integer started; default { state_entry() { llRequestPermissions(llGetOwner(), PERMISSION_TAKE_CONTROLS); llTakeControls(CONTROL_UP, 1, 1); } control(key id, integer level, integer edge) { if (started == 0) { x = llGetPos(); starting_height = x.z; llSetTimerEvent(0.05); llResetTime(); highest_height = 0.0; started = 1; } } timer() { x = llGetPos(); current_height = x.z; if (current_height > highest_height) { highest_height = current_height; } if (llGetTime() > 5.0) { llSetTimerEvent(0.0); started = 0; llSay(0, "Jump height was: "+(string)(highest_height - starting_height)); } } }