Grazie Daniele,
I now understand what causes the problem. It looks like this was a perfect example of a corner-case as the terms are shown in an extra DIV formatted as a block-quote and the rest of the page apparently was just within boundaries of the plugin’s design limits.
Just out of interest, if all we’re doing is replacing text with extrq HTML to display the link and the tooltip. Under what conditions have you seen the added HTML break the page design? It would seem to me that as long as the HMTL is valid within the context of valid HTML, the page should work fine.
Kind regards