Comment 3 for bug 128518

thisfred was going to check on:
1) adjusting the metadata system to fallback to the default value if the metadata field value for an object isn't valid.
2) Does this mean that the silvalayout metadata set will need to be updated to specify a default value (?)
3) or if there is no default value use the first item?
4) it can't just be set to None, since there was value initially?
And, a warning should be logged about this...