Thanks for your response, Richard. I'm using an Epson 2200 and paper size was 5x7. To update, I reinstalled the prior Win 7 version of 2.7.0.2 and everything worked fine. The problem occurred with 2.7.0.5. Never had the margin issues before.
I tossed out the defective print but I recall that the print faded over the course of about 1" into an unprinted area about one third of the paper. The print above the fade appeared normal..
I hadn't tried running additional test prints to confirm everything is back to normal but at this point I can only conclude there's a bug in the v. 2.7.0.5.