Flashing story view slide thumbnails

Anyone mind explaining this one for me??? (See attached video)

This occured eariler today when, in storview, I duplicated a scene and then used my mouse scroll wheel to scroll from the bottom of the Story view to the top. It now wont stop doing it. Closing the storyline file seemed to stop the problem but as soon as I duplicated a scene or scrolled to the top of story view it started again. Now its doing it as soon as I open the file.

This is resulting in stoyline slowing down to an eventual halt and crash, which results in any work done after the my save being lost.

Has anyone experienced this issue or can shed some light on it?

It boggles my mind the amount of new problems and bugs that crop up on a daily basis whilst using this program!

Related support case number is 00320785