#23 expr: syntax error when running sudosh-replay

[Freeda Suing]

I encounter this error when i am replaying a video:
root@kfcprimary-ssd:~# sudosh-replay manager-root-1298672409-nC8ReCTwl7DAzIQ8
expr: syntax error
root@kfcprimary-ssd:~# cat /etc/passwd

Although I can replay the video, I do not want to see this error. Even when I ssh to it using a user with /usr/local/bin/sudosh shell it occurs.

My OS is ubuntu10.04.2 64-bit