Incoming mails show as read

Hello,

We have upgraded to R6.0.3 two months ago and still working with Lotus Notes client 5.0.10.

Suddenly in the last days users are experiencing problems with unread marks.

Some incoming mails are showed as read when the have not been opened yet.

And in other cases mails already read changed to unread.

This issue is annoying the users.

Anybody could help me?

Subject: Incoming mails show as read

We have two users that this is happening to as well(Correction 4 users now). This started all of a sudden about a week ago.

Is this happening to anyone else? Anyone have any ideas?