I came across this interesting toast message when voting on comments in the Stack Exchange Android app:
A "vote of comment"? Perhaps the message should be the same as on the site:
You may only submit a comment vote every X seconds.
Additionally, on the site I am rate-limited to five seconds, so the message is doubly wrong.
Yet, the rate-limit doesn't seem to be strictly enforced. Sometimes I get this message, and at other times it lets me vote as many times as I like.
There is no toast message, or any indication really, when you try to upvote a comment that you have already upvoted.Edit: this has been fixed.