We have done a test db attach migration. The wss sites migrated nice
and smooth. But the portal is a nightmare.

The entire navigation structure is flat after the migration. We have
all areas in level 1 instead of 5 areas as we had in 2003.

Our contact at Microsoft have not been able to find a solution.

But there must be others who has a portal that they have migrated?
What have you done with this? Have you done it manually? I really hope
not..