it seems the galaxy generator has some problems in beta 3...
i started a random map game (the big one, 30 planets, 5 stars)
the biggest trouble was that the star system i was in had no connection to the other stars (first i thought i have to research the long jump travel first now, but it didn't change anything...)

so after wiping out the enemy in the first system i'm stuck there...
another glitch was a travel lane directly through the sun (looks odd if my ships fly through the sun)