Unfortunately its down to the terrible scaling anti-aliasing built into After effects. There use to be a plug-in that would help but this no longer works on after effects since 7 and has never been updated.  I've tried just abut everything to get around this issue but nothing works

Too bad...

Here's a thought: Maybe you could keep the original Star Wars logo from the film and just mask out the crawl until the logo has disappeared. At that point switch over to your blank starfield for the rest of your custom crawl. Aside from that the only thing I could think of would be trying to make the title in Macromedia flash which is vector based and animate it receding there. Might work, I'm not sure. 

I would do that, IF I was using the original Logo. But what I tried to do was recreate the german Version of the title. The original trilogy always had the title "Krieg der Sterne" until 2004 with the DVDs it was replaced by the original Star Wars Logo. And there went another part of my childhood....

I have finished the three title crawls now (and sync'd them with the music as well) and I'm pleased. But thank you anyway.

By the way, does anyone know a videoplatform other than youtube that can handle 1080p videos? I can't upload or watch any video that contains music from Star Wars on youtube due to copyright issues in Germany.