|: oups,sorry for the double rebuild, I saw your post only once I pressed the Submit button...
You couldn't have guessed and I didn't want to wait ... ;-)
: The invisible posts have reappeared, your are a Master Bernhard!!!! Big THANKS!!!!
No, not a Master. Although I really tried hard to implement the forum in such a way that message disappearances could not happen, they nevertheless do. :-( However, the forum is reasonably stable and useful and even if some messages do not show up, they are not really lost. :-)
Well, I guess this shows that software for concurrent usage is still a difficult business. And that makes it an interesting challenge.