I think is good idea move this thread to suggestions.
Funny you'd say that. Actually, @Smooey and myself have discussed this problem before (check links below). While this isn't necessarily a bug but a conscious setting, it does need to be revised, or at least include a warning message for images that don't meet the required size, as Smooey suggested above.
Gallery Slideshow Doesn't Work
Gallery Slider Preview Images Not Displaying - (wbb 4.1 beta 4) - FIXED
Don’t have an account yet? Register yourself now and be a part of our community!
