I have just downloaded and installed Zimbra Desktop 7.2.1 for my MacBookPro running Lion 10.7.5.
When I attempt to execute the app I get an unresponsive script error.
The system logs the following 2 entries:
1)12/24/12 12:35:10.712 PM [0x0-0x1b01b].com.zimbra.zdclient: Can't find string terminator "'" anywhere before EOF at /Applications/Zimbra Desktop/Zimbra Desktop.app/Contents/MacOS/reopen line 21.
2)12/24/12 12:35:11.574 PM [0x0-0x1b01b].com.zimbra.zdclient: launchctl start error: No such process

I have been running the Desktop for about 8 mos successfully when it recently refused to execute due to these errors.
I installed a new download today and the errors persist.
I have tried to execute with the firewall "off" but same results.