As of v5.1.0.5, Scribble renders `racketblock', `codeblock', `interactions', etc., in a different way than before. Indentation relative to surrounding text is now implemented by a nested-flow style, instead of adding spaces to the start of each line. (Using spaces was a hack from before sorting out various rendering problems with nested code blocks.)
For most Scribble documents, you shouldn't notice the difference, but `scribble/sigplan' mode for Latex/PDF output is an exception. The Scribble style adjustments for the SIGPLAN format now introduce vertical space before and after a code block. The change is intended to make uses of `racketblock', `codeblock', etc., look better by default, but the change could make existing documents look worse. To disable the extra space (because you don't like it or because you've already added space in some other way), add these commands in your document's Latex configuration: \renewcommand{\SCodePreSkip}{} \renewcommand{\SCodePostSkip}{} _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users