A KNOWN ISSUE appeared in Build 49 and was thought to be fixed in B62. If the thumbnail went black, so did the main screen. However, the thumbnail no longer goes black, so we thought this one was resolved. But it is still present in B62 and is related to Backgrounds disappearing within a multipage cue (namely Lyrics) when editing the presentation. We have identified the cause and are working on a solution. However, the immediate workaround is to:
1) Select your Background image in the Edit Area
2) In the Ribbon, choose Object Visibility->Hide on All
3) Choose Object Visibility->Show on All
This will reset the Background to appear on all pages within the cue. Please call us if you have any issues with this.