If you're using Windows, you can use the Task Manager, or Perfmon to compare the CPU and memory at the start when the Presentation first begins, and compare it to a later time when the scrolling slows down. For Linux, you can use the System Monitor.
In reference to the above, the scrolling is slowing down; however, there is no change in the CPU or physical memory. Any other ideas of things to check?
Intel D33217GK units with Intel Core i3-3Z17U 1.8 GHz, 4 GB RAM, Windows 7 32 bit and an Intel HD Graphics 4000 card.
I did notice that this Presentation is using the old Spreadsheet Gadget. Have you tried using the Spreadsheet Widget that we released a short while back?