LW had reported instances of stanzas which on the original page have no space between them, and are delimited only by an indent in the first line; these were showing up with spaces between them, and the problem wasn't solved by setting margin-top: 0 on the <lg> tags. The reason was that there's also a default bottom margin on stanza elements, so any stanza followed immediately by another with no space needs a margin-bottom: 0 setting too.