Quite often I read a comment thread, and then decide which comments I vote up. As soon as this is more than one comment, I get an error message that I can cast only one comment vote every 5 seconds. -- This happens quite frequently, while I don't remember ever having hit any other rate limitation of the site.

I think comment votes are quite useful to quickly find the important comments, and are rather used too little than too much. So wouldn't it be possible to make the comment vote rate limitation a bit more ergonomic, e.g. by setting only a maximum number of comment votes per minute, per hour or per day? -- Say, hitting a limit like 6 per minute or 60 per hour would already be much less likely.