ID 17.1
Language: German
Using User-dictionary

If I'll add a word from text (wich contains an uppercase letter at first position) to the user-dictionary using context-menu (right click on mouse), I get the option to add. After this, the word is added, but only in lowercase, although the checkbox "upper/lowercase active" is enabled.
Workaround: Adding the word with uppercase letter by using the menu-bar: "Bearbeiten -> Rechtschreibprüfung -> Benutzerwörterbuch" inserts the word in uppercase.
Please have a look and change it.