We are having the same problem. Our Metadata just disappears. ArcMap 10 SP3, Sequel Server 2008. After adding metadata (by the way it takes forever for the metadata to load in Catalog, sometimes 30 seconds for a few tags). The metadata somehow gets deleted after saving. Validating only deletes the metadata. This is extremely frustrating to have to constantly add the metadata over and over again hoping it works. exporting and importing does not work either. Upgrading the metadata does not fix the problem.
Has anyone seen this issue with 10.1? We had a number of feature classes that had metadata and lost it but not all feature classes lost it. We are SQL Server 2008R2.
Most of our featureclasses that had this happen just sitting in SDE. Only thing I can think that acts on them is our Geodatabase Maintenance routine (Compact/Rebuild Indexes/Analyze). Could that cause lost metadata? Could this be affected by moving in and out of feature dataset?
-Hunter