|Developing Custom Themes / Custom Themes Advanced Topics|
New versions of Jive often include changes to FreeMarker (FTL) files that make up the application's user interface. These changes are usually made to support new features or feature enhancements.
If you've created custom themes that extend FTL files included with the application, you might find that, when you upgrade, you need to edit templates in your custom theme in order to keep your theme working and looking as it should. For example, you might need to edit your template to pick up functional changes in the included template it's based on.
For a snapshot of the changes made since the preceding release, take a look at the FTL Diff Report, which shows what changed in each of the FTL files that changed.