This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
There's no problem -- that's the way forms work in HTML. If there is a submit button on the form, a return in any field will cause the button to trigger.