What do you mean with »different«? This strange behaviour appears even if I do not change anything.
Just tested it: opend a file, did nothing in the file, pressed cmd-s and cmd-w and glyphs asked me if I want to save the change (that did not happen)
That’s what I think. If I’ve changed a glyph used as a component (say changing the sidebearing of o), the composite characters ö, ó, etc. are marked as altered when I save, and I have to save again. I don’t consider it an inconvenience, but since it’s being discussed …
The double-save thing is where I began experiencing all my crashes. I would save a change, then go to quit Glyphs and the “Do you want to save” would pop up. I even tried waiting a minute or two before quitting to see if that would stop it, but it did not. I can also say that with the latest build, 1204, the crashes have become rare.