Lighttpd

I'm using lighttpd-1.4.r1734, and I have been seeing the following error periodically:

Jun 26 11:45:46 lighttpd[453]: (network_writev.c.111) writev failed: Invalid argument 7 
Jun 26 11:45:46 lighttpd[453]: (connections.c.592) connection closed: write failed on fd 7 
Jun 26 11:45:47 lighttpd[453]: (mod_cgi.c.1310) cgi died ? 
...
Jun 26 12:00:34 lighttpd[453]: (network_writev.c.111) writev failed: Invalid argument 7 
Jun 26 12:00:34 lighttpd[453]: (connections.c.592) connection closed: write failed on fd 7 
Jun 26 12:00:35 lighttpd[453]: (mod_cgi.c.1310) cgi died ? 

The writev() man page says the EINVAL:
The sum of the iov_len values overflows an ssize_t value. Or,
the vector count is less than zero or greater than the
permitted maximum.

So this looks like a bug. The CGI in question is a data pump that was producing a ~7mbps stream and it runs for long periods of time. I think the problem is triggered when lighttpd is handling another connection, but I haven't been able to prove that. The annoying part is that I haven't been able to catch this happening with gdb attached (it only seems to happen when I'm not looking :).