Neilio, that's a negatory, good buddy!
In the first iterations of Deskscapes 3, turning on any effect with any dynamic .dream (ovals, photodream, etc.) would break the preview window and not work at all with your real desktop .dream.
In the latest iteration, effects work as expected in the preview, but the dynamic dreams still fail to work with the desktop. Currently, they play for second or so and then pause/fail/erase/otherwise break, depending on the dynamic dream.
I've tested this with Vista 32 and Windows 7 64 and the results are the same...ergo broken.
So while the beta is getting closer and closer, it's still got a lil ways to go.
Cheers to the new stuff though!
PS I guess that means I am officially reporting this bug to you fine gentlemen. hehe