I'm asking because I frequently have to switch between GtkRadiant 1.5 and 1.6.x because of its different functions and benefits. And I'm reaching the point where it really gets frustrating because of bugs. The 1.6 GtkRadiant compared to 1.5 is a must when using the vertex tool. However, every single time I use the vertex tool, it has a 60-70% chance of breaking my brush, making it invalid, detaching the vertex, adding an extra vertex where it shouldn't exist, and ultimately deleting my brush possibly when using the brush cleanup tool, and duplicating itself when I ctrl Z my way back, and sometimes there is no way back. On top of all of this, when I finally get it to work, it's only a matter of time before I can come back to the same area and find that it's been broken and bugged again and I have to re-do so many brushes. And on top of that again, when it even seems fine in the editor, finally I compile it and find that it's completely broken in-game, with holes and gaps all over the seams. And there's quite a lot of mappers here, and it makes me curious - what do you use? What advantages, disadvantages compared to any of these? Some benefits and disadvantages that I see: 1.5 Great navigation in 3D view, possible to move camera in all directions smoothly using ctrl, shift and mouse. 1.6 is missing some features here making it harder to navigate.In-built texture folder menu + easy to reach texture/shader reloading buttons. Much easier than 1.6.Generally stable software that has intact functions. You must split brushes manually before using the vertex tool (for terrain and other bent brushes).Only has box select, not the 'rolling' over visible brushes with the mouse.Buggy artifacts in the 3D view (at least on Win 7) if you don't use Windows Basic theme (or so) 1.6 Has a way to shift the face of a brush around, used by alt + left click.Superior vertex editing toolShows alpha channel-shaders in the 3D view, makes a nice preview besides some bugginess.More features (I haven't tried most though), also available in the menus and UI Generally crashy software, many functions do not work and it may crash when using certain tools.Doesn't have box select, only 'rolling over' visible brushes with the mouse.Surface inspector doesn't stay in front, makes it hard to use. Otherwise a bit buggy.Vertex tool can be more handy, but will often destroy your brushes (Brush Cleanup)No translation tool/gizmo (W in 1.5) and no rotation gizmo.Can't undo texturing done by ctrl shift middle mouse (which you can in 1.5)Often displays buggy gaps in split brushes. Don't know if this is caused by 1.6, or only revealed by 1.6Bad navigation (and seemingly low FPS when moving camera)Bugged rotation tool.Clumsy axis rotation tool (offsets from original position when used).