Version: (using KDE Devel) OS: Linux Associations are made my clicking on a widget then clicking on another widget. This is slightly unintuitive. It should also be possible to add associations by dragging the mouse from one widget to another.
In ArgoUML hovering the mouse over an item creates buttons around it, representing different actions, e.g. an association. Clicking on this button and then clicking on another item creates an association. This feature would be great.