Disappearing document properties?!

I do not even know how to describe this problem as I have never seen or heard about something like this before.

I have an application running on a 6 server. We upgraded the users client to Notes 6.5.1 after having been on Notes 5 before and running the app on a 6 server for a while.

Two things are happening now:

  1. Often the user just gets the hour-glass and task manager shows a “Not responding” message. Can’t do anything but kill Notes.

  2. CLicking on a document to get its document properties and by clicking on document info or the fields tab, the info is displayed for 2-3 seconds and then just disappear!!

Any help will be appreciated.

Thanks

Johan