there seems to be a curios problem on latest beta (2346) regarding MMX code explorer window and docking / desktop layouts:   - start with the attached layout (where only difference to standard layout is that code explorer window is docked on left side) - create, save and compile a new VCL app - run it once (so that layout switches over to default DEBUG layout) - open Unit dependency analyzer - hit F9 to start the project again   --> This undocks Code Explorer windows but does not hide it     also after stooping the project it is still visible. Reloading the use layout results in a changed layout:     and you cannot drag of the MMX windows any longer. You have to restart the IDE to make it working again.   TEST MMX Error.dst