I tried it on chrome and the rendering of the images looked great. I will have to try it on my mac and see that it still works. I have to agree with worker that you should consider moving from flash to HTML 5. For example, I iPads don't support flash and a lot of folks like viewing images on their iPad. If you're programming oriented you could do the slideshow with jQuery and html (I just watched a tutorial that demonstrated that.) jQuery/html is browser neutral although HTML 5 is considered the new/modern way to doing these things.
After I wrote this I saw why you used flex...again, the only issue there is it might not work on apple devices.
Oh, while I only took a quick look, your images that I did get to see are lovely!