[Plugin: WP-ImageFlow2] Image sometimes not showing in the Lightbox

When cycling (rather quickly) through all the images using the built-in Lightbox effect, I sometimes get no image to see.

The image is not showing on the page, I only see the title of the concerned image and the text “Close”.

The phenomenon is not easy to reproduce on the following test page. So look at the capture 1 for the page and at the capture 2 for the code.

Any idea to solve this problem?

http://wordpress.org/extend/plugins/wp-imageflow2/