I'm an avid cube spinner, and have encountered a pretty odd problem. Every now and again, the cube spin effect refuses to connect two video clips. It's very prejudice against some, and then other times, it eventually gives in after a severe series of restarts. I know all the basics, the clips are the same size/etc./they're on the same video channel, all that noise. Looking to see if there are easy solutions to this and maybe even why it happens. Thanks all.