Bug Exporting as Animated Gif

Hi,

I created a simple project with a jumping ball. Project size is 720x480. I tried to upload the HTML file on the forum but it is not possible. When I export the animated gif I got the result below.
As you can see the image is partially visible because the part where ball jump on the ground is not visible. How can I fix this?

Hmm, our gif renderer seems to be on the fritz. Mind letting me know what kind of computer/screen you are using?