WebSlides in WebKit: during or after each slide, something does not load - 5 views
http://www.diigo.com/05a0d for a highlighted view of WebKit Bug 12408: Documents loaded via "javascript:" URLs have empty URLs. Comments there include an Interesting comparison with Firefox, with ...
And this is just the tip of the iceberg; annotations could include sound and video clips, links to other suggested resources ("see also..."), hyperlinked search strings for the library catalog, WorldCat.org, Diigo, Google, or other sources, plus about a zillion things that I can't even think of.