Version: 1.5.2 (using KDE KDE 3.5.2) It seems that Umbrello organizes the diagrams of the projects by having them all opened and listing them as tabs in the tab bar. If an Umbrello project starts to grow, the tab bar will be cluttered right away, which makes it more difficult and very impractical to navigate the project's diagrams. It would be nice if Umbrello organized the project's diagrams as a one-level tree, where the branches contained the various types of diagrams (class, sequence, collaboration, etc...) and that the diagram tabs could be closed at will, without having to delete them.
It's already implemented. Go to the general configuration options, deselect "Use tabbed diagrams", exit and restart Umbrello This bug is a duplicate of 94795: http://bugs.kde.org/show_bug.cgi?id=94795 (I can't mark it as duplicated myself, but I think it'll save an admin to look for the other bug ;) )
Thanks Daniel. *** This bug has been marked as a duplicate of 94795 ***