Flash on Mac

So, I’m running Flash CS3 on my MacBook Pro (17") with Intel Chip… I just got it like 2 months ago. But I’m noticing that there’s a lag when I’m working in Flash. double-clicking on layers to rename them, switching in and out of the symbols, just everything seems to be running as if I’ve got a million CPU intensive programs running while I work.

I’m wondering if anyone has noticed something similar… also, were there two different versions that were shipped out - one that came out at launch and then another that is now being shipped with the new Macs (on Apples website) that is “more” compatible with the Intel Processors?

Thanks in advance.