In "excerpt lists" showing an overview of comments -- such as the "AddOn Comments" box on the
main AddOns page or the "Latest Comments" section on
author pages -- the single-line excerpt for comment that start with a quote show text from inside the quote, instead of the actual text of the comment. This is less than ideal, especially when there's an extended exchange going on.
See also:
Probably whatever generates the summary should ignore anything inside [QUOTE] tags.