I imagine this request has to be a duplicate (and I know for a fact has been mentioned in comments before), but I can't find a similar one via search other than Jon Skeet's per-post cap.
I've seen several posts of users upset that you could get higher scores based on the order of answer acceptance. As an example, someone who has earned 185 rep in a day could get his answer accepted and then upvoted (resulting in +200), or could get upvoted then his answer accepted (resulting in +210).
Also, an accepted bounty at the beginning of the day usually eliminates the chance of earning any more rep on that day, but if awarded at the end then it gets applied above and beyond what the user has earned for the day.
Wouldn't it be easier to implement the system such that only upvotes and downvotes are capped at 200 points per day? That way, this would never be a problem and people wouldn't have to play games to get around these restrictions.
TheTXI and cletus have brought up the other issue I forgot to mention. If you get 21 upvotes in a day followed by 1 downvote, you are only up 198 for the day. If you get 20 upvotes, a downvote, then another upvote you are up 200 for the day.
Bounty added for no reason whatsoever.
This feature-request has been implemented! https://blog.stackoverflow.com/2010/03/important-reputation-rule-changes/