How do you come to the conclusion that CUPS is the culprit here?
Did you up[date only CUPS and nothing else? Usually there come many more packages with the system updates.
The functionality which failed for you has nothing to do with printing. Did you see any evidence that CUPS is blocking it?
Try the following:
Run in a terminal window
sudo stop cups
This turns off CUPS. Can you post now?
Now run
sudo start cups
Does posting stop working again?
If you downgrade CUPS, are you able to post again?
How do you come to the conclusion that CUPS is the culprit here?
Did you up[date only CUPS and nothing else? Usually there come many more packages with the system updates.
The functionality which failed for you has nothing to do with printing. Did you see any evidence that CUPS is blocking it?
Try the following:
Run in a terminal window
sudo stop cups
This turns off CUPS. Can you post now?
Now run
sudo start cups
Does posting stop working again?
If you downgrade CUPS, are you able to post again?