Version: 1.3.1 (using KDE KDE 3.3.2) Installed from: Debian stable Packages OS: Linux To reproduce this bug, make a couple classes, then select the Composition tool. Click on the parent, but don't click on a child. Instead, click on the pointer tool. Now there will be a dotted red line across the diagram, which won't go away.
same phenomenon in all diagram types *** This bug has been marked as a duplicate of 101539 ***