[K12OSN] Flash+LTSP = crashes? gdm_slave_xioerror_handler

[light being]

I have set up a LTSP server in a cybercafe, and the terminals are crashing 
occasionally.  I found  error "gdm_slave_xioerror_handler" in 
/var/log/messages

Any other logs/diagnostics I can turn on or look at???

Have read in some places it's caused by Flash, which indeed has been 
installed a few days earlier.  Everyone's using FireFox.

apt-get upgrade plus reducing colors to 8-bit on the terminals, seems to 
have improved it.

But it doesnt seem to be totally gone - only less frequent.

I even tried FireFox alone on the GUI 'safe terminal' "or safe mode" - 
crashed the same.

Certain pages seem to cause the problems.   One such animal was this:

http://www.casines.com - unfortunates one ends up there when mistyping
http://wwwig.com.br - which redirects there.

Sep  5 18:58:03 ltspserv dhcpd: DHCPREQUEST for 192.168.0.105 
(192.168.0.254) from 00:50:04:ae:18:19 via eth0
Sep  5 18:58:03 ltspserv dhcpd: DHCPACK on 192.168.0.105 to 
00:50:04:ae:18:19 via eth0
Sep  5 18:58:03 ltspserv rpc.mountd: authenticated mount request from 
ws105.ltsp:658 for /opt/ltsp/i386 (/opt/ltsp/i386)
Sep  5 18:58:04 ws105.ltsp syslogd started: BusyBox v0.60.4 
(2005.04.19-03:58+0000)
Sep  5 18:58:08 ws105.ltsp init: Entering runlevel: 5
Sep  5 19:00:44 ltspserv gdm(pam_unix)[8406]: session opened for user term5 
by (uid=0)
Sep  5 19:00:45 ws105.ltsp ltspinfod: Connection from 192.168.0.254 port 
38082
Sep  5 19:00:45 ltspserv gconfd (term5-8484): iniciando (versão 2.8.1), pid 
8484 usuário 'term5'
Sep  5 19:00:45 ltspserv gconfd (term5-8484): Endereço 
"xml:readonly:/etc/gconf/gconf.xml.mandatory" resolvido para uma fonte de 
configuração com permissões apenas de leitura na posição 0
Sep  5 19:00:45 ltspserv gconfd (term5-8484): O endereço 
"xml:readwrite:/home/term5/.gconf" resolvido para uma fonte de configuração 
com permissões de escrita na posição 1
Sep  5 19:00:45 ltspserv gconfd (term5-8484): Endereço 
"xml:readonly:/etc/gconf/gconf.xml.defaults" resolvido para uma fonte de 
configuração com permissões apenas de leitura na posição 2
Sep  5 19:00:48 ltspserv gconfd (term5-8484): O endereço 
"xml:readwrite:/home/term5/.gconf" resolvido para uma fonte de configuração 
com permissões de escrita na posição 0
Sep  5 19:01:01 ltspserv crond(pam_unix)[8595]: session opened for user root 
by (uid=0)
Sep  5 19:01:01 ltspserv crond(pam_unix)[8595]: session closed for user root
Sep  5 19:17:25 ltspserv gdm[8406]: gdm_slave_xioerror_handler: Erro fatal 
no X - Reinicializando ws105.ltsp:0
Sep  5 19:17:25 ltspserv gdm(pam_unix)[8406]: session closed for user term5