Be careful how you use that wormhole generator.  I used it to breakup a siege of a planet I couldn't get to before the enemy fleet conquered it so I could save a colony transport stationed there.  The attacking fleet was sent to god knows where just fine, but the game insisted that the planet was still under siege and still wouldn't let my transport ship leave.  I couldn't free it when my relief fleet arrived either since there was no enemy fleet to defeat.  That planet was still under siege when I moved on to a new game with the next update   

Exactly. Meant to mention the anomaly was still guarded by indigenous fortresses, after transporting the Xeloxi ships away.