[Edit: Issues, Bugs, and Requested Features should be tracked at Google Code, not here -- matt, 2010-04-23]
Less Wrong is still under construction. Please post any bugs or issues with Less Wrong to this thread. Try to keep each comment thread a clean discussion of each bug or issue.
Requested features... sure, go ahead, but bear in mind we may not be able to implement for a while.
I don't know about showing the whole thread, but showing just the immediate parent would be an improvement.
Or rather, clicking a comment should just jump to that comment in the thread. But if we have a page of recent comments a la Hacker News, then showing the immediate parent of each parented comment would make that recent comments page pretty effective as an overview of current discussion on LW, I think.