Image distortion

I notice I’m getting some distortion on my images when alpha tweening them in. Is there a reason this occurs and is there a way to resolve the problem?

See the problem:
click on “movie” and then “cast”… the problem occurs when loading cast pictures.

Also, if you notice the cast slider has a few bugs. If anyone has a good version of a similar slider would be much appreciated.

I know, long loading time, i have yet to break the movie down into segments.

Please Help!