The exact text of the alert is:
Hyphenation breaks may change if you edit the text in this document.
The following hyphenation services are not installed on this system -
Proximity (English: USA)
Proximity (English: UK)
I'd welcome the chance to edit the text and take my chances with the hyphens. But the alert can't be made to go away, and no work can be done.
Why we pay so much for software that just doesn't work I don't know.
That error message is telling you that your installtion was incomplete and that neither of the standard dictionaries for US or UK English have been installed. That's a fairly serious error and you should re-run the installer in repair mode to see if the dictionaries get installed.
Many thanks for those thoughts.
I de-installed CS6, downloaded a fresh installation, ran the upgrade to 8.01, and now it seems stable.
Only it hasn't imported my preferences from CS4 and most importantly my workspaces including a library of set styles and objects. This is a complete disaster. But as it's another topic, I'll ask a fresh question.
The earlier problem was solved, though. Thank you for that.