How do i specify wcf behaviorExtension class type without the assembly version number?

Question

I have a web app that uses a WCF service that utilizes a behaviorExtension like so:

Answer 1

Apparently it's fixed in .Net 4.0 beta 2. Not much use to me, who is stuck with 3.5.

http://connect.microsoft.com/wcf/feedback/details/216431/wcf-fails-to-find-custom-behaviorextensionelement-if-type-attribute-doesnt-match-exactly