Problem solved, thanks to the mailing list. :) Here's the answer that solved it:
[quote]Most likely you changed the spacing in the paragraph settings. Make sure you select the offending text and click Edit > Paragraph Settings and set the Line spacing back to default.[/quote] -- View this message in context: http://lyx.475766.n2.nabble.com/Headline-spacing-irregular-tp6840087p6858484.html Sent from the LyX - Users mailing list archive at Nabble.com.