socketfilterfw and repeating error messages

Every two seconds I get the following messages via Console:

Standard    13:47:41.404793 +0100   socketfilterfw  MacOS error: -67065
Standard    13:47:41.405321 +0100   socketfilterfw  UNIX error exception: 3
Standard    13:47:43.393518 +0100   socketfilterfw  MacOS error: -67065
Standard    13:47:43.393927 +0100   socketfilterfw  UNIX error exception: 3

And they keep on and on. Turning off the firewall, they disappear, of course. Now I wasn't able to find the meaning of the mentioned error codes. Does anybody know what goes wrong here?

Solution 1:

The program causing the error is WiFiSpy, see here: https://itunes.apple.com/de/app/wifi-spy/id541505649?mt=8