Strange action in Notes Client Mail DB

I have been using N/D 9.0 for several months now and has been working fine. Yesterday, for no apparent reason, in the mail database I can see the content of an email in the preview panel, but when I open the mail document the body is blank. I don’t believe that I have made any changes to the settings so this is totally strange, and I have no idea even where to start to fix the problem.

Subject: Just used the Standard Windoz repair process

Exit all programs, clse Windows and reboot the computer, re-open windoz. and of course the documents display correctly. Go Figure!