So I'm testing this product out and and one of my testbeds I run into this very same error. A google search brings me to this page. I follow the directions in post #4 and and get the following results:
a page about ubuntu 7 and using rc
this thread
a thread that no longer exists
a thread about ldap
a wiki link with the error message not in it
a second wiki link with the error message not in it
Using 8.04lts
Open Source Edition Downloads: Enterprise Messaging and Collaboration Software by Zimbra 32bit version
downloaded
extracted
sudo sh ./install.sh
./util/utilfunc.sh: 223: Syntax error: Bad for loop variable