Help!

I just got the PS CS3 beta and suddenly every icon I make is waaay over lj's 40 kb limit. On PS7, I generally saved my icons as maximum-quality (12) jpegs and they'd come out somewhere between 10 and 30 kb. Now I'm doing the exact same thing and they're coming out between 45 and120 kb - I have to bring them down to medium to low quality just to get them in under 40 and it's not a good look at all. *flails* Am I doing something wrong or is Adobe just evil? Is anybody else having this problem?