This bug also affects me in Intrepid 8.10 on both computer A and
computerb

COMPUTER A (vncserver):
t...@eli:~$ ls -la /etc/alternatives/vncserver
lrwxrwxrwx 1 root root 22 2009-02-15 17:31 /etc/alternatives/vncserver -> 
/usr/bin/realvncserver
t...@eli:~$ vncserver 

New 'X' desktop is eli:1

Starting applications specified in /etc/X11/Xsession
Log file is /home/timw/.vnc/eli:1.log

t...@eli:~$ tail -fn20 /home/timw/.vnc/eli:1.log 
15/02/09 17:49:23 Xvnc version 3.3.7 - built May 24 2007 12:47:11
15/02/09 17:49:23 Copyright (C) 2002-2003 RealVNC Ltd.
15/02/09 17:49:23 Copyright (C) 1994-2000 AT&T Laboratories Cambridge.
15/02/09 17:49:23 All Rights Reserved.
15/02/09 17:49:23 See http://www.realvnc.com for information on VNC
15/02/09 17:49:23 Desktop name 'X' (eli:1)
15/02/09 17:49:23 Protocol version supported 3.3
15/02/09 17:49:23 Listening for VNC connections on TCP port 5901


t...@eli:~$ vncconnect -display :1 amos
*** glibc detected *** Xrealvnc: free(): invalid pointer: 0x09e1b46c ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6[0xb7d143f4]
/lib/tls/i686/cmov/libc.so.6(cfree+0x96)[0xb7d16456]
Xrealvnc[0x80b1f66]
Xrealvnc[0x806beaf]
Xrealvnc[0x806c01c]
Xrealvnc[0x8061578]
Xrealvnc[0x804b5aa]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5)[0xb7cbb685]
Xrealvnc(__gxx_personality_v0+0x139)[0x804aa31]
======= Memory map: ========
08048000-0815c000 r-xp 00000000 08:02 33839      /usr/bin/Xrealvnc
0815c000-08163000 rw-p 00114000 08:02 33839      /usr/bin/Xrealvnc
08163000-08184000 rw-p 08163000 00:00 0 
09d43000-09e6b000 rw-p 09d43000 00:00 0          [heap]
b7900000-b7921000 rw-p b7900000 00:00 0 
b7921000-b7a00000 ---p b7921000 00:00 0 
b7a30000-b7a40000 r-xp 00000000 08:02 202357     
/lib/tls/i686/cmov/libresolv-2.8.90.so
b7a40000-b7a41000 r--p 0000f000 08:02 202357     
/lib/tls/i686/cmov/libresolv-2.8.90.so
b7a41000-b7a42000 rw-p 00010000 08:02 202357     
/lib/tls/i686/cmov/libresolv-2.8.90.so
b7a42000-b7a44000 rw-p b7a42000 00:00 0 
b7a44000-b7a4e000 r-xp 00000000 08:02 197149     
/lib/tls/i686/cmov/libnss_files-2.8.90.so
b7a4e000-b7a4f000 r--p 00009000 08:02 197149     
/lib/tls/i686/cmov/libnss_files-2.8.90.so
b7a4f000-b7a50000 rw-p 0000a000 08:02 197149     
/lib/tls/i686/cmov/libnss_files-2.8.90.so
b7a69000-b7a81000 rw-s 00000000 00:09 102072333  /SYSV00000000 (deleted)
b7a81000-b7a88000 rw-p b7a81000 00:00 0 
b7a8f000-b7a93000 r-xp 00000000 08:02 197148     
/lib/tls/i686/cmov/libnss_dns-2.8.90.so
b7a93000-b7a94000 r--p 00003000 08:02 197148     
/lib/tls/i686/cmov/libnss_dns-2.8.90.so
b7a94000-b7a95000 rw-p 00004000 08:02 197148     
/lib/tls/i686/cmov/libnss_dns-2.8.90.so
b7a95000-b7aad000 rw-s 00000000 00:09 102039564  /SYSV00000000 (deleted)
b7aad000-b7ac5000 rw-s 00000000 00:09 102006795  /SYSV00000000 (deleted)
b7ac5000-b7add000 rw-s 00000000 00:09 101974026  /SYSV00000000 (deleted)
b7add000-b7af5000 rw-s 00000000 00:09 101842949  /SYSV00000000 (deleted)
b7af5000-b7b41000 rw-p b7af5000 00:00 0 
b7b45000-b7b5d000 rw-s 00000000 00:09 101941257  /SYSV00000000 (deleted)
b7b5d000-b7b75000 rw-s 00000000 00:09 101908488  /SYSV00000000 (deleted)
b7b75000-b7b8d000 rw-s 00000000 00:09 101875718  /SYSV00000000 (deleted)
b7b8d000-b7ba5000 rw-s 00000000 00:09 101810180  /SYSV00000000 (deleted)
b7ba5000-b7bbd000 rw-s 00000000 00:09 101777411  /SYSV00000000 (deleted)
b7bbd000-b7bcb000 rw-p b7bbd000 00:00 0 
b7bcb000-b7be3000 rw-s 00000000 00:09 101744642  /SYSV00000000 (deleted)
b7be3000-b7bfb000 rw-s 00000000 00:09 101711873  /SYSV00000000 (deleted)
b7bfb000-b7c17000 rw-p b7bfb000 00:00 0 
b7c19000-b7c1b000 r-xp 00000000 08:02 4620315    /lib/libnss_mdns4.so.2
b7c1b000-b7c1c000 rw-p 00001000 08:02 4620315    /lib/libnss_mdns4.so.2
b7c1c000-b7c1e000 r-xp 00000000 08:02 4620316    /lib/libnss_mdns4_minimal.so.2
b7c1e000-b7c1f000 rw-p 00001000 08:02 4620316    /lib/libnss_mdns4_minimal.so.2
b7c1f000-b7ca5000 rw-p b7c1f000 00:00 0 
b7ca5000-b7dfd000 r-xp 00000000 08:02 197140     
/lib/tls/i686/cmov/libc-2.8.90.so
b7dfd000-b7dff000 r--p 00158000 08:02 197140     
/lib/tls/i686/cmov/libc-2.8.90.so
b7dff000-b7e00000 rw-p 0015a000 08:02 197140     
/lib/tls/i686/cmov/libc-2.8.90.so
b7e00000-b7e03000 rw-p b7e00000 00:00 0 
b7e03000-b7e10000 r-xp 00000000 08:02 197154     /lib/libgcc_s.so.1
b7e10000-b7e11000 r--p 0000c000 08:02 197154     /lib/libgcc_s.so.1
b7e11000-b7e12000 rw-p 0000d000 08:02 197154     /lib/libgcc_s.so.1
b7e12000-b7e36000 r-xp 00000000 08:02 197144     
/lib/tls/i686/cmov/libm-2.8.90.so
b7e36000-b7e37000 r--p 00023000 08:02 197144     
/lib/tls/i686/cmov/libm-2.8.90.so
b7e37000-b7e38000 rw-p 00024000 08:02 197144     
/lib/tls/i686/cmov/libm-2.8.90.so
b7e38000-b7e39000 rw-p b7e38000 00:00 0 
b7e39000-b7f1c000 r-xp 00000000 08:02 32869      /usr/lib/libstdc++.so.6.0.10
b7f1c000-b7f20000 r--p 000e3000 08:02 32869      /usr/lib/libstdc++.so.6.0.10
b7f20000-b7f21000 rw-p 000e7000 08:02 32869      /usr/lib/libstdc++.so.6.0.10
b7f21000-b7f27000 rw-p b7f21000 0XIO:  fatal IO error 11 (Resource temporarily 
unavailable) on X server ":1.0"
      after 9 requests (6 known processed) with 0 events remaining.


COMPUTER B (viewer):
t...@amos:~$ ls -la /etc/alternatives/vncviewer
lrwxrwxrwx 1 root root 24 2008-11-25 15:25 /etc/alternatives/vncviewer -> 
/usr/bin/xtightvncviewer
t...@amos:~$ vncviewer -listen
vncviewer -listen: Listening on port 5500
vncviewer -listen: Command line errors are not reported until a connection 
comes in.

-- 
vncconnect crash vncserver
https://bugs.launchpad.net/bugs/41940
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