MySQL crashing on signal 11 many times...

[remet]

>Description:
    Maybe it's HW problem, maybe OS, but maybe MySQL... I don't know why but
MySQL crashin on signal 11 about 2 times a day. the last core-dump is here:
free.xprojekt.cz/mysql/mysql.core. thank you for help.

>How-To-Repeat:
    Sometimes, about two times per day.
>Fix:
    You should know it :-)

>Submitter-Id:	<submitter ID>
>Originator:	Martin Cerveny
>Organization:
 
>MySQL support: [none | licence | email support | extended email support ]
>Synopsis:	
>Severity:	
>Priority:	
>Category:	mysql
>Class:		
>Release:	mysql-3.23.11-alpha (Source distribution)

>Environment:
	
System: FreeBSD anezka.xprojekt.cz 2.2.6-RELEASE FreeBSD 2.2.6-RELEASE #0: Sun Dec 12
14:23:08 CET 1999     root@stripped:/usr/src/sys/compile/ANEZKA  i386


Some paths:  /usr/bin/perl /usr/bin/make /usr/bin/gcc /usr/bin/cc
GCC: gcc version 2.7.2.1
Compilation info: CC='gcc'  CFLAGS=''  CXX='c++'  CXXFLAGS=''  LDFLAGS=''
LIBC: 
-r--r--r--  1 bin  bin  536490 Mar 25  1998 /usr/lib/libc.a
-r--r--r--  1 bin  bin  422937 Mar 25  1998 /usr/lib/libc.so.3.1
Configure command: ./configure  --prefix=/usr/local/mysql
Perl: This is perl, version 5.004_04 built for i386-freebsd