Suggested YC News CSS patch
Here is the above paragraph with a leading space to trigger/demonstrate the problem:
Currently, you can use a line-leading-space to create a PRE+CODE block in a YC News story or comment. This has an intended, usually desirable effect -- the PRE+CODE text does not wrap. If the PRE+CODE text includes a long line, however, there is another usually undesirable effect -- the width of the enclosing block element grows, and then even *non* PRE+CODE text anywhere on the page fails to wrap. Reading even simple unrelated paragraphs/comments then requires horizontal scrolling.
A simple fix would be be to add to the news.css stylesheet: pre {overflow:auto}
Then, the PRE block will get its own horizontal scrollbar, when necessary.