The other day I took the top cover off of my D and put some tape on the inside of it and that’s definitely done the trick. I used 3m VHB tape, because that’s what I had, but any foam-core double-sided tape should do the trick; I didn’t remove the backing from the side that’s in contact with the PCB. The VHB tape that I have is about 1mm thick, and reinstalling the top cover was a firm fit, so it doesn’t need to be anywhere near as thick as what Radu attached as an example. The PCB is 100% stable now, I don’t have any issues with the USB port anymore, and the power-on button only protrudes slightly.

I can’t be 100% sure, because I don’t have any photos, but I think the top plate might have been installed back to front on mine – i.e. with the holes for the Geiger tube (and GPS LED) on the wrong side. It’s probably worth everyone checking to make sure that the holes for the Geiger tube are on the left, when the display is facing you.

I had an issue just now where I arrived home and the D connected to the wireless, after which I started a sync of the offline data from the drive home. The samples uploaded at a rate of about 2 samples per second, at which point I initially thought that the API must have had a dramatic performance improvement, however I discovered that none of the data uploaded and the dashboard was still reporting that the last data upload was as I left work. I disabled the wireless and re-enabled it and it connected this time but, of course, the offline data from the drive home is gone. Nothing of note happened, and I didn’t go out of my way to record any specific data, so I’m not too worried but there was obviously an issue with the wireless.

I need to try another AC adapter at work, to see why it’s unable to charge the battery over the course of an entire workday; at home it charges relatively quickly.