Need help with a physics joint

Hi, just messing about with a CAPX of mine, trying to work out how to get an object tethered to another using a physics joint. If you try this CAPX and move the ship near the orange block, they'll 'connect together (no graphic to indicate that yet, just a text box). This works fine but if you then thrust the ship up the screen, the orange box slowly gets closer and closer to the ship, until it's above it!

Anyone know why it does this and how to fix it?

Cheers.

CAPX

DEMO

It looks like it's a bug with joints. I landed on a higher ledge and the orange box just sat above the rocket like you said. The joint offsets aren't the same at different positions.

Oh, OK thanks R0j0. Maybe Ashley or Tom could confirm this? Saves me trying to find a fix. <img src="smileys/smiley1.gif" border="0" align="middle" />