Andrew, feedback on issues you noted in the last couple of days.
?? ( 1) On Compositor freeze: ... just enable zoom mode, click inside canvas so zoom bar appear and zoom set itself to 1.3 and then click on indicator area. Compositor freeze.
(1) I now have tried all kinds of ways to get this to happen as you outlined, but it just always works correctly. Maybe like you said, optimization, but that does not make any sense to us. And why only since 2019-11-07 or maybe that is just as far as you went. I really wanted to see this freeze but did not.
??(2) I was trying to see if I can use this area of Compositor window where small vertical indicator of playback position moves (I hoped to reuse it for faster scrolling, like it was done in Viewer window).
(2) Faster scrolling in the Compositor works like the Viewer window when you pan on the indicator (at least for me). It might be a little slower in the compositor because it has to update the cursor on the timeline too and keep track of things. So am not sure why you do not see the same type of speed up that you do in the Viewer.
??(3) ...is there way to make ths 'jogwell' speed control ... for faster than 2x playback/reverse?
(3) The shuttle plugged into a usb does this really, really well. But a good idea that might work would be to add an "accelerator" to the play forward / play reverse keys on the keypad (the Enter and + keys). By accelerator, I mean you hold down the key longer and it speeds up and the longer you hold it down the more it goes "like a bat out of hell". Have to ask gg to see.
??(4)... clicking on video track for some reason autoselect both video and audio tracks now??
(4) As far as I know, it always has worked this way and highlights all tracks if I understand your question correctly. That is, double left mouse click on the timeline highlights (inverts the color) the video and audio. I am talking about in Cut and Paste mode.
??(5) I can see fade again, and it works on all tracks as fade.
(5) Sometimes the minimum and maximum range in the bottom timeline zoom bar get accidentally set to bad values. For example if you set the range for Audio Fade to "-3.0 to -2.0" you will not be able to see the automation Fade line in the audio tracks. So if your auto is enabled and you can not see the line, check the ranges on the zoom bar.
??(6) Sorry for a lot of noise ...
(6) This is not noise -- it is quite helpful to us. As in # 5 above, we learned something new which is that the shortcut "Alt-f" and "Ctrl-Alt-f" are supposed to reset the automation ranges to good max/min ranges but only if within certain limits. And now we know that this is something that needs to change to work better.
??(7) I hope your dog himself is OK
(7) Now that the dog door is fixed with a new rope, yes the dog is OK but he was upset for several hours before that.
??(8) I dragged label right (beyond media end) and left (again, much left, so label become invisible), and then again right (all without releasing LMB). Now, I can't see label ... but sometimes with strange time.
(8) It looks a little strange and probably should stop at the beginning with a timestamp of 0. You can delete this as you probably already know, but this would be a good cleanup mod for gg. It should look the same as if you put a Label at the Home / Beginning position.
??(9) just re-introduced Ogg/Theora video, while working in itself warns me in MPlayer ...
(9) GG will continue to work on Ogg and will see what the problem you reported of "Broken file, keyframe not correctly marked" means and hopefully can fix it. We have been able to reproduce this so can fix it.