FY everybody's I, if the .html page associated with a HighSlide gallery is saved to a different location in say, Dreamweaver or any other editor that auto-updates paths and links within a document the path to hs.graphicsDir is NOT updated.
The same will apply if files are manuallyt moved to different folders. You must remember to manually update the path defined in highslide.config.js
The symptom of the error is the continual display of "loading" when any thumbnail is slected for enlargement