My only suggestion is to tweak your rotating icon so that it moves a bit slower. The faster an animated gif is, the more likely it will look jerky, as the OS occasionaly pauses to do something else.
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.