Hello Marc,
We are obliged to always show this message, we will also be adding it into the new (Java) eID Viewer.
If you would like to go around this message, the way to go would be to rebuild the eID middleware and to remove the message.
You can find another thread about this here:
http://groups.google.com/group/eid-mw/browse_thread/thread/1e13606fcf754c45The latest 3.5 SDK supporting released build (for mac and windows) can be found in the 4.0.3 branch.
For Linux that would be the 3.5.6 branch
Wkr,
Frederik