Bug 155374 related to adding the ability to set a Title. The internal slide show settings needs the ability to choose 'show image title', similar to 'show image caption' so that the title can be shown.
Reproducible: Didn't try
Could be displayed in a similar fashion to Flickr slide shows, where title is bold, caption is not.
*** This bug has been marked as a duplicate of bug 283417 ***
Fixed with bug #283417