I created an epub quite awhile ago and went to add titles to the master page. When I drew out the text box, it included a blue pound sign and when I hit a key, it inserts a large black image. The image varies depending on the key. I can't seem to delete so I can just type text again. Any ideas on how this was inserted and how to get rid of it?
It sounds like you are showing hidden characters the blue # is the end-of-story marker that appears a the end of any story (or the beginning of any new text frame because the end of the story is the beginning until you add text). Not sure what the black pictures are... What font are you using?