The demo site is using a stock 2.6.0 release. Does the sync process fail, or are you just noticing entries in the error log? At any rate, you should get the same results as the demo site, assuming your configuration is the same (running in full trust, same version, etc).
Can you send me a problematic image for me to study? Provide full details of the error message that the image causes on your system. Email me at roger*at*techinfosystems*dot*com
Roger Martin
Creator and Lead Developer of Gallery Server Pro