Hi, I found this error, like many others and I started an investigation. The SQL worked well in the database and the values were the expected, so I suppose that the problem was in the javascript.

I notice that the blank slide was always in the same position: after one concrete slide of one node. And this node have only one strange thing: a link to other site.

And finally I found the problem.

It happens when you have an URL in the content you are trying to show. For example, something like this:

The <a href="http://www.ferrari.com">Ferrari F40</a> is a mid-engine, rear-wheel drive...

Then, the slide you show makes code for the href element and puts it on a new slide, but with no image, no text... nothing, and thats because it appears blank.

I solve the problem forcing the option "Strip HTML tags" in my field (in this case the Teaser), so the href dissapears and all works well, but will be good if the slider test it too, because this problem is not obvious.