Despite flashing latest firmware, 20140812 and saving files to my 32 bit computer the videos produced by my E-Prance 0803 are always jerky. Could anyone suggest a remedy please? I am using a 32gb Class 6 Card
It's almost certain to be the computer that is struggling, try a faster computer to prove this. You could also try a lower resolution video mode and possibly lower quality setting in the camera to reduce the amount of data the computer has to deal with.
Nigel has a good point but you may not necessarily need a faster computer. Try freeing up some memory and run as few other programs as possible while viewing videos. Sometimes this can help. Depending on your computer, swapping in a better performing graphics card and/or adding some RAM in the future might also be a remedy.