Apple has nothing to do with Flash. Talk to Adobe.
I realize Adobe makes Flash, but Apple makes the system software that Flash is suddenly not all that stable on. I never had this problem on Leopard, but after upgrading to SL, suddenly Flash crashes regularly. Considering SL shipped with a downgraded version of Flash and 10.6.1 was shipped quickly to make it more compatible with the latest version of Flash, I'm putting the onus on Apple for this one.