Here are the results of my testing on Beta V3. I was playing around with the scripting (.BAS files). Everything was done in manual mode (or whatever you call the "not Auto" mode). Also note that I didn't really know what I was doing, so there may be some user error involved.
1. There are some times right after startup where the CHKD menu partially disappears or disappears altogether. I couldn't really come up with reproducible steps. I could always get the menu back w/out much problem (one or two button presses and it re-draws). I guess this is more or less consistent with what Beaver reported. Though I never had the camera crash while navigating the menus.
2. I briefly tested shoot_full and shoot_half - both seemed to work as expected with press, release and click.
3. The shoot command does not take a picture. It will focus and beep, but then the script stops executing at that point (though you can still interrupt the script by pressing the shutter button).
4. When I use the set_iso command, the settings do not take effect.
5. When I use the set_tv command, the settings do not take effect.
6. When I use the set_av command, the settings do not take effect.
7. Things like click "menu", "down" and "set" do not do anything.
8. get_tv appears to crash the whole camera (screen goes black)
9. get_av_rel appears to crash the whole camera (screen goes black)
10. get_focus, get_iso, and get_av don't actually get the values.
Away from the scripting, I tried some simple overrides
11. Override ISO Value: 2 Value Factor: 100 -> ended up with ISO of 320
Override ISO Value: 10 Value Factor: 10 -> ended up with ISO of 160
12. Setting the shutter speed to 2sec. appeared to work as expected. However, when I set to 1/1000sec, I am not convinced that the setting actually took place (I though the pic. should have looked significantly underexposed, but it looked fine). However, when looking at the picture in Playback mode, it claimed that the shutter speed was 1/1000sec.
I'm not at all familiar with the code, so that is about as much help as I can be at the moment. Thanks again for all the effort. I'll look forward to playing with more of the Betas.