Hm, okay. That's what I thought it would be, but then it's not very effective defensive programming. If it clears the content of the input fields, on a subsequent press of the Next or Previous buttons, nothing would happen, it would just stay blank. Only when another entry was added to the map, and the user didn't fiddle with the input fields, would it regain normal operation. With the way everything is set up, if you suddenly make the input fields writable, many things would stop making sense