Digital BW, The Print

Greetings, 

I unpacked the 3800 about a month ago and have been printing test 
charts ever since.  The charts I printed two weeks ago are all 
perfect. I am back at it today after a two week break and I cant seem 
to print at any setting without paper movement. I can actually see 
the paper swing and jog out of place as it prints the last column of 
the Eye One RGB test chart. All of the other 26 columns are perfect,  
only the final column is printed with a ghost. I cannot print charts 
using the same paaper settings I used two weeks ago without this 
happening. I have tried wide and wider platen gap settings. I have 
tried custom paper thickness, but nothing seems to change the final 
jog-over during paper transport. 

Any help would be greatly appreciated 

thank you

E Appert