[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.
Some changes to karma have been deployed today. Posts will now show scores less than zero, previously scores below zero were shown as zero. Votes on posts are now worth 10 points up or down to the contributor. Also the threshold to be able to post is now 50, up from 20.
It's unclear -- do you mean that the number of points received for posts gets multiplied by 10, both for positive and negative votes? This factor seems too dramatic. I'd go for 2 or 3, no more. One also has to take into account that posts get more votes than comments simply because more people rate them, so the effect of a post is already greater than that of a comment.
Also should (have) been discussed in one of the open/meta threads in advance of deployment.