wysiwyg suddenly not displaying correctly but output ok

Was working in a project in RoboHelp HTML 7 and all of a sudden, my font no longer displays correctly and an image I have selected for "See Also" now shows as a placeholder.  However, when I generate FlashHelp, all looks ok.  What happened to wysiwyg?  This is happening throughout the entire project, not just one topic.

I tried deleting the .cpd and .xpj files and opening the .hhp file but that didn't work.  Has anyone else experienced this?