Theme preview on wordpress.org is not working

Hi,
We just uploaded the new version of ColorWay Theme but we have facing some problem that with previous version of this theme i.e 3.2.5 the preview on https://wordpress.org/themes/colorway link will work, but when we uploaded new version of this theme i.e 3.2.7 the preview link show nothing/blank.
So can anybody help me to finding out the problem with the theme preview.

Thank in advance.