Just a tiny little cosmetic bug. If you make a blueprint variable category, using pascal or camel case, ie RedSpoon. If you drag-drop a variable onto that category, it will make a new category called Red Spoon. Meaning you now have 2 categories with a space difference. You can see by opening the category menu after doing the above.
The drag-drop is reading the resulting friendly name after the capitalization system is processed.
Hardly a big bug, but figured I would report it.