I'm having some problems with the thumbnail for my flash files. The first time I tried, without choosing a thumbnail, the thumbnail was just a black square with "flash" written inside it. Then when I tried an image as a thumbnail, it showed a really small preview image when I hovered my mouse above it. Then I tried having a smaller (file size) image and made it square, and now not only it's small, but also distorted.

I know the journal is probably not the best place to ask for this kind of help, but I think that's just me being new to the site and not know about some small thing that can fix it. Any help would be greatly appreaciacted ^^