Bash auto-logout truncates "timed out waiting for input: auto-logout" string

[West Stephen-QSW000]

Configuration Information [Automatically generated, do not change]:
Machine: powerpc
OS: linux-gnuspe
Compiler: ppc_85xx-gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='powerpc'
-DCONF_OSTYPE='linux-gnuspe' 
-DCONF_MACHTYPE='powerpc-montavista-linux-gnuspe'
-DCONF_VENDOR='montavista' -DSHELL 
-DHAVE_CONFIG_H  -I.  -I.. -I../include -I../lib  -O2
uname output: Linux DMICTRL 2.6.10_mvl402-UBS-DMICTRLKERNEL-REL-001 NONE
ppc GNU
/Linux
Machine Type: powerpc-montavista-linux-gnuspe
 
Bash Version: 2.05b
Patch Level: 0
Release Status: release
 
Description:
        I am using a custom board with a serial console running at a
baud rate of 115200.  I have a TMOUT value set, and when that value is
reached, the console auto-logout happens.  Often, the auto-logout string
printed by bash gets truncated.  It should read "timed out waiting for
input: auto-logout", but instead it reads "timed out waiting f".  I do
not see this issue if I am connected to the board over a faster
interface such as when I ssh to the board over an ethernet interface.