I noticed in the last few hours that my reputation has stopped incrementing when I get new up-votes: -
Has something gone wrong or has the well dried up?
I noticed in the last few hours that my reputation has stopped incrementing when I get new up-votes: -
Has something gone wrong or has the well dried up?
... You can earn a maximum of 200 reputation per day. Please note that votes for posts marked “community wiki” do not generate any reputation, while accepted answers and bounty awards are not subject to the daily reputation limit.
This means that (assuming you don't have any questions upvoted) you can receive 20 answer upvotes in a day before the reputation cap kicks in for that day. Other sources of reputation, such as an answer being accepted, or receiving a bounty, do not count towards your 200 reputation limit.
Below is a picture of your reputation for April 5th, when you received 230 reputation. You can see each row labeled upvote adds up to a total of 200 reputation, which is exactly the reputation cap. You didn't "lose" any reputation due to having more than 20 upvotes. You also had two answers accepted as "correct". These are shown as "+15" and are outlined in green. The "accept" reward does not count towards your 200 reputation limit, nor does reaching the 200 reputation limit prevent you from receiving that 30 reputation.
On May 3rd, you received reputation only from upvotes (no "accepts"). You can see that the first 200 reputation was counted, and the other upvotes are acknowledged but not counted. You can still gain reputation, but it can only be from answers accepting, or bounties, not upvotes.
There is a daily cap on reputation increase.