- set portal default locale to other value than "english" (Control Panel > Portal > Settings > Miscellaneous > Display Settings > Default Language: German)
- go to Control Panel > Content > Categories > Add Category
- Enter Name: cat1
- Click "Save"
=> Popup closes but the category is not added to the category list. In fact it is added, but is has null name and null title and is not visible in the list
- after trying to add it again, the message is displayed: "That category already exists.". Pobably because there is already a category with null name.