Note this is in the SL viewer AS well as
Firestorm 7.2.4.80712 Release
Description
  1. Upload Mesh Screen
  2. Mesh selected, then in physics screen.
  3. Layout has changed (Analyze etc) if you select Solid and High Model - it is really slow to process (even with detailed logging off).
User documentation also still shows Havok and gives no guidance on how to use the new Section 2 for Hull etc.
Each time it eventually just times out making houses using surface physics unfeasible.
I tested with user created physics then also Step 2 physics. Both Firestorm and LL Viewers have issues in generation.
Secondary Bug:
If you use Section 2 and reset all items, the options in Section 2 stay greyed out so you can't make changes to test physic costs. You have to start the uploading from scratch again.