If by "rebase" you mean landing a craft at a different base then the base it originally came from, I think I've seen a similar bug myself in the last installer I uploaded. I also experienced a crash when transferring a craft from one base to another.
I'm not sure if this has already been fixed in the SVN by now or not, I've had a busy past few days and have a busy weekend coming up, so I really can't check right now.
If time permits, I'll try to build another installer and upload it Sunday, and I'll check the SVN logs when I update.