Hi Can - We recently just upgraded to EPM 10.0 SP24 .NET4 version as well, while at the same time having just applied support packs - BPC 801 SP12.
We also are seeing some behavior that seems to be related to the accessing the metadata correctly.
We have some member selections that are filtered based on a property value and a couple users are unable to pull the data back for that report based on those member properties. Clearing/refreshing the metadata does not seem to help.
I do not have the issue on my machine, but when this user logs onto my machine the problem occurs again.
Did you ever get any resolution to this?
Thanks-
Melody