[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.
"Then the occasional downvotes for stupid reasons will wash out faster."
The frequent downvotes for stupid reasons, however, will accumulate much more rapidly.
Quality control is important. You can't make things better just by doing stuff faster than before, more than before, not least because there are usually quality tradeoffs with speed and quantity.
Meh. You said yourself that someone behaving irrationally has unpredictable behavior. So downvotes for stupid reasons are just noise, and should in large numbers be countered by either upvotes for stupid reasons, or other comments' downvotes for stupid reasons. If there is still a considerable amount of voting for good reasons, it should usually show through the noise.
This analysis obviously assumes that there isn't a systemic bias in the mix, like "always upvote Eliezer" or "always downvote Marshall".