D2007 project group losing projects

Hello1

I have imported a project group from D2006 to D2007.

The project group has 18 projects. When I close D2007 and reopen the project
group, there is always 2-3 random projects that are missed in the group. I
re-add them and save. When I close and reopen, the same thing happens
sometimem. There is nothing "wrong" with the group file (nor read only,
etc).

If this a know problem or just me :-P ?


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