Waves and jerks on rotation

Hi all !

We are a small french team, trying to create a virtual tour that won't be read online but stored locally. So don't worry about the black screens during loading times.
We meet rotation issues in our cubic pano : fuzzy waves and jerks.
We looked for solutions on these boards and applied all of the ones we found : Flash 10 ON, increasing move and still quality to highsharp, increasing details to the max, slowing down camera movement etc.
Nothing does the trick, impossible to eliminate this problem.
We tested the pano on a Macpro Octo 2009 14Gb RAM (GC Radeon HD 4870) and a PC Octocore 14 Gb RAM (GC Nvidia GForce 9800 GT)
All the images are untiled 1024x1024.

Have a look here

Do you have others solutions to help us ?
Thanks in advance for your help.

Hello and thanks for the quick reply.

We just tested your solutions and they seem to help a little bit on the Mac (less jerks), but not at all on the PC.
How do you think we could improve it ?

TIA.