The upgrade from 3.3.0 to 3.3.1 was in the file wordpress-3.3.1-partial-0.zip. I’ll try to remember to update this post as future versions come out. I’m not sure of the exact file format. I think it’s -partial-0/1/2 to mark how many minor versions back the upgrade goes.

Personally, I use these files for minor upgrades because it’s faster, but I use the full download file for a full version upgrade.

It took me forever to get my head around it. Eventually, I tracked down where the issue was coming from, and between Ferg and I, we solved it. I’m pretty confident we found the underlying cause of the problem. So I whipped up a patch and headed off to submit it. Again, Zen Cart is not very developer friendly. I had to file a bug report in this forum and then attach my patch.

I think there’s a huge market for an open-source ecommerce platform. Something with the power and flexibility of Zen Cart but simpler to use, install and manage.