please help on apt-move weirdness

[zw@zhaoway.com]

apt-move 4.1.9

zw@dumblink:1 ~ $ sudo apt-move localupdate
/usr/bin/apt-move: line 122: syntax error near unexpected token ('
zw@dumblink:1 ~ $ 

the script contains some `(' and `)' where it should be `{' and `}' (??)
but if this is the case, then how came that `()' became `{}' ??

i encounter this problem after only visible faults as some severe
fsck trouble, but is it possible? otherwise, i cannot remember
any reason that could cause apt-move suddenly complains this. :(