This morning's Click 'n Save email update featured a link to enter the Do You DING sweepstakes. I clicked on the link and tried to enter. Each time I fill out the entry, type in the characters seen in the image and hit enter, I get an error message that the characters were not typed in correctly. I gave up after about 10 tries.

I recall NW had a sweepstakes a few months ago also run by eprize, entrants had the same error problem.