[lug] sed from cron job fails (works from command line)

[Ben]

I've got a bash script that runs fine from the command line, but when I
call it from cron.daily, I get the error

sed: -e expression #1, char 139: Invalid range end

The bash script is (slight simplified)


#!/bin/sh
cat somefile|sed -e 's/\(.*RCPT\ from\ \)\([a-Z0-9\.\-]*\)\[\([0-9\.]*
\)]:\ \(.*;\).*from=<\(.*\)>\ to=<\(.*\)>\ proto.*helo=<\(.*\)>.*/\2\t\3
\t\5\t\6\t\7\t\4/g'



I'm guessing that some environment variable is messing up the char
escaping of the sed line, but basically I'm stuck since it works from
the command line. 

Thanks,

Ben