On appending in posemoding, Blender could crash. Found out the new 'select appended' also sets the 'active base/object'. This isn't OK on that level of the code, 'active' exists (and needs to be set) on UI code level in src/, not in the middle of file reading function. Also removed weird negative bitflag that enforced 'select appended' to be default. If you want that, set the flag itself in do_versions or so. In my opinion it is best saved in .B.blend instead. Another time...