[syslog-ng]v1.5.23 crashes

Hi, I don't know since when and what I did before, but my syslog-ng crashes. I the core dump I saw, it prints a message "io.c: sockaddr2info(): Unsupported address family %i.\n" where %i is 27749. But the value of %i changes with every crash. The crashes occures in line 1032 of the file io.c. But the error is before. The addr parameter in do_read_line (sources.c:61) is a invalid value for an address family. I couldn't find the piont, where the incorrect address family is set. Is this a known bug? Bye, Joerg.