Relationship "Userpoints Transactions: Entity ID" breaks the view

Hi,

I just updated views from a 6.x-3.x-dev version of March 2011 to the latest release 6.x-3.0-rc3.
Everything work fine on the website except some Userpoint views that are broken.

The view breaks (empty result) when I try to add a "Userpoints Transactions: Entity ID" relationship.
But it works with the "Userpoints Transactions: User".

I have the same behaviour with both 6.x-1.2 and 6.x-1.x-dev versions of Userpoints.

Any idea where it could come from ?