I found a wrong behavior of the "New from Template" dialog in this revision:
Bug #7480:
In the "New from Template" dialog changing from the category "<All categories>" to another doesn't change the displayed templates. There are still the same as before.
When switching back to "<All categories>" no template is there. Only deactivating/activating one of the "Show ...-based templates" checkboxes shows the templates again with this category selection.
After some category changes everything works fine again, if you don't select "<All categories>" again. Then everything starts from the beginning.
It doesn't matter what checkboxes are selected both or only one of them.
Daniel