I'm new to Diigo, so the usual apologies apply. I have found that, on one page at least (http://bit.ly/d5MWqP), the actual highlighting box extends one line below the selected text. This has the effect of obscuring the next line completely. I have found this behavior in Chrome and Firefox but haven't tested it in IE. Thanks.
Pediatrician and computer support person with "Serving in Mission" (SIM) in Nigeria. Interests include Nigeria; web design and tools; Ruby on Rails; science and theology; Christianity; Islam