I was recently asked to reprint an A3 poster made some months ago, when it printed perfectly. This time, there were problems. The background to the poster is a radial gradient created in InDesign CS2 using a CMYK colour and when I printed it (same printer, a PS3 Canon with a Fiery RIP) there was a distinct and abrupt change of colour at the edges of the gradient on the corners of the page. There are no spot colours in the file. My colour profiles have all been synchronised in Bridge. Any suggestions as to what the problem may be and what I can try to get it to print correctly? Even printing from a PDF hasn't resolved it.