Animation introduces an artifact, also how do I up the resolution on the final frame?

[JustKen]

Hi all, my first post to the forums.

I'm working on an animated logo for my wife's company, and I've got one problem and one question. My problem is this: If you open the attached file and preview it, you'll see a thin yellow nearly-horizontal line that isn't in any of the component frames. The line also appears if the animation is exported and viewed in a browser. Any ideas of how to get rid of it?

And my question is, I'd like the last frame to be at the high resolution of the original non-animated logo, instead of the jagged one you see now. Can I do this in the Flash file itself, or should I use a web scripting language like PHP to replace the animation with the high-rez logo after it runs?

Thanks for your help!