ArcGIS 10.2.1 Upgrade - Double Datatype Issue

Since upgrading our ArcGIS Server from 10.1 to 10.2.1 we have run in to a snag when trying to identify a feature that contains a double value, even if that value is not included in the map service. If the value is NULL it will identify fine. The same issue is also present in ArcCatalog but not in ArcMap. The underlying data resides in a ArcSDE 10.1 database on SQL Server 2008 Standard R2.

We have copied the data to a file geo-database and the identifying is fine, likewise if we change all double values to NULL in ArcSDE.

Has anyone else experienced this and if so, were you able to fix it and what did you do?

Thanks.