We are also experiencing this issue. We have had several clients come back to us saying there are gaps around our images (when in fact they are extended way past the borders on the slide). This problem occurs when the user resizes their browser. It seems to be when the browser is full screen, it fixes the gap.
I have attached two screenshots of what our clients are seeing. This file was published for their LMS and the screenshots were taken while viewing in SCORM cloud.
Seeing as how we cannot deliver our products until this error is fixed, we are hoping for an update soon.