Hi all. I'm running zen 1.1.7 version on php5. earlier i was on php4. these days im not able to open full images.

see an example here:
http://pics.gandhadagudi.com/mungaru-male-wallpapers/mungaru-male-003.jpg.php

should i upgrade to the latest version, this problem will be solved?

This is most likely a htaccess/modrewrite issue. Either you don't have modrewrite on your server or the htaccess file is not setup correctly or missing.

Btw, that is not the full image but the size image on that link.