This database has a persisted computed column, which is computed by calling a .NET function. When changing compatibility from MSSQL 2005 to 2012, I was presented with error 10334, which looks more like a warning: it's telling me that it had to mark one of the tables as has_unchecked_assembly_data.
What it doesn't tell me is what to do about this. Should I leave it as is? Should I force the column to be recomputed somehow? How?
The documentation for alter assembly unchecked data lists several causes for this, and I think #1 is the only one that applies to this database. It also doesn't explain how to unmark such columns.