Literally translated, it says:
Frog jumped in
Sound of water
I quite like it, just like I like most haiku. The Bureau of Public Secrets has a page with lots of information about this particular haiku, and 30 translations into English.
Also, for those of you playing along at home, the 'nonsensical display' icon was from the opening animation of Metal Gear 2: Solid Snake. It said so in the comment-field of the icon, but you were all such good sports and didn't peek! :)