Well, I blew that!

Turns out it had been 250 gig all the time. For some strange reason I had assumed it was a 500 gig disk in the G5 but it wasn't. That was pretty embarrassing. I can only assume that I got confused by the fact that I had installed a 500 gig drive in the recent imac I bought and that I was thinking of that. Well. I am still installing software on the machine on and off and the whole thing was pretty irritating. Still I am back to normal now (mostly)