Version: 1.3.2 (using KDE 3.3.2, (3.1)) Compiler: gcc version 3.3.5 (Debian 1:3.3.5-13) OS: Linux (i686) release 2.6.14-1-686-smp To make the bug express itself: - start a class diagram - create three classes named, say, one two and three - add a containment of one by two, and of two by three - save the model - exit Umbrello - restart Umbrello and re-open the model - one of the classes has disappeared from the class diagram, and cannot be replaced there.
1.3.2 is prehistoric - current version is 1.5.7