Notable changes from 2.9:
- things got moved into the Shimmie2 PHP namespace to avoid conflicting with external libraries. You'll probably want to add
namespace Shimmie2;to the top of any.phpfiles that you've added on top of the base install. - search functions got moved into a search class (eg
Image::find_images()->Search::find_images()) - probably lots more? It's been a few years... If you're having any issues upgrading feel free to file an issue