We just started having this problem since upgrading to 10. Our data is in a file geodatabase. The user creates a point, it is highlighted and shows up in the data view, when the selection is cleared, the point disappears. It is still in the database but the user cannot see it in the map view. If I re-add the layer (using a layer file with the same definition query and same symbology), the feature shows up. But after a few more edits, the same problem returns and the features are disappearing again.
I should note that the file geodatabases have many feature classes and their are many layers in the mxd.
Faith Stuart
North Carolina Department of Transportation
Management Systems and Assessments Unit