Of my 3 stations, one did not like the online upgrade to 3.7.2. They were all of the SD card type.
Just out of curiosity, I decided to try to upgrade the problem station again, but using the Debian add-on this time. It’s working perfectly now.
Any functional differences between the SD card and Debian add-on that I should make a note of?
If it was sd-card before, it’s still sd-card image after.
The package is the same, just the piaware configuration differs and manages some system stuff.
Also some extra packages like piaware-web.
Doing
apt-get update
apt-get upgrade
is basically the same as using the buttons on the website.
I followed this procedure:
Now the home page for that station shows:
Feeder Type: PiAware (Debian Package Add-on) 3.7.2
Instead of:
Feeder Type: PiAware (SD Card) 3.7.2
Starting from a fresh image or form a piaware sd-card?
You are not being very clear in your first post if you used a fresh Raspbian image.
upgraded the problem station.
Using a different image is not really an upgrade in my eyes.
(upgrade: sudo apt upgrade)
What functional difference are you asking for?
The data feed to flightaware is exactly the same.
The package used on the piaware sd-card is the same.
The configuration is different as dump1090-fa is not controlled by piaware when not on the piaware sd-card image.
That’s probably the main difference.
Also you can’t use piaware-config.txt to configure the network.
Thanks. I’ll re-image the SD card.
?confused?
That’s not what i said. But i guess you want for example the gain configuration be the same on all your installations? Or what’s the reason for re-imaging? 
No…just for consistency with the other 2.