Wall-E wrote:
Recently, someone else had similar problems.
A screenshot of the print dialog box revealed that they had the 'crop to fit' box ticked, and the pic was NOT of the correct aspect ratio.
The image aspect ratio, the canvas size and the printer settings must all match to get full-bleed (borderless) prints.
I think Wall-E hit on the problem. Looks like something in your set up was inadvertently changed.