I killed tons of help related files from the user cache and prefs directory. With the start of the help viewer the hiutil process ran for some minutes and build up all the relevant files from the scratch. Now it works perfectly!
It is as always with a major upgrade of the OS! Most of your problems are related to your old stuff in the user library.
First of all, the user library is now hidden in Lion:
- Go to the terminal
- enter chflags nohidden ~/Library
Go to your user account, library is visible now
Go to the directory "cache" in your user library, start a search for "help", kill the help cache
Go to the directory "preferences" in your user library, start a search for "help", kill all related files with the ending .plist, there are a lot
Start the help viewer
Start "activity" app, watch the process "hiutil", it will ran for some time, as a result, some hundred new app related pref files will be added (the help viewer is searching all your apps for the implemented help files)
Start the help viewer after "hiutil" has ended
Thank you very much! It seems to work but I have to re-open certain help pages two or three times before the message "computer is not connected to the internet…" doesn't show up again and I can see the actual help content. Anyway, I am happy that I can display the once unavailable help content after all.