Strange border when using Vryanormalmap

[stevesideas]

I'm using the above shader with a standard normal map. For some reason, there is an odd border around the areas of where the normal map has data for bump information. Any ideas why this is happening?

I'm talking about the darker shade where the arrow is pointing. If I turn off normal maps it goes away. There is no information here apart from the standard light blue colour representing a flat area.

[hermit.crab]

Best you send the scene to support@chaosgroup.com so we can take a look. Mention this thread in the e-mail along with your V-Ray and host platform versions.