I've found that inetd on (*atleast*) Debian distribution of LiNUX crashes
when port 13 (daytime) / port 37 (time) is "half-open scanned"..
Half-open scanning means that you:
1) send SYN
2) if reply is SYN|ACK, send RST = port is listening
3) if reply is RST = port is not listening
I'm not skilled enough to write the code-piece for you to test this out,
but most of the new portscanner include this type of scanning method.
(scantcp 1.32, sirc, etc.)
Quick & dirty workaround:
Comment out daytime & time services from /etc/inetd.conf and restart inetd.
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/ moOd [@invalid.org]