Seam 2 Reexplode causes full undeploy + deploy on AS6

After upgrading an existing seam 2 project which runs on AS 4.2.3 to run on AS 6 I'm seeing an issue where if I run an reexplode from the seam-gen ant build the application server does a full undeploy and then deploy of the app. This kills any development as I should be able to edit an jsf xhtml page and have that reflected immediately without having to redeploy.

Appears the redeploy scanner is too aggressive or seam-gen is copying over something that worked for reexplode in AS4 but not in AS6