There used to be a limit on upvotes for comments (Allow more than 1 comment upvote in 5 seconds). Today though I found a good question with a list of intelligent comments and quickly upvoted them all. Suddenly, I realised that this was something new. Has the rule changed?
The five second message
Update: @studiohack Merged my answer
I would like to add that I hate the 30comments/12hour feature and I wish the powers that be at SO would consider moving to an unlimited karma supply with certain hourly or per minute restrictions to deal with misuse.
**Update: The 5 second message is back again! **