I am trying to vote http://stackoverflow.com/questions/2741548/stopping-pirates/2741595#2741595 , which has no vote of mine on it, and I constantly get "Vote too old to be changed..."
This is by design, but..
Based on all the "vote too old" feedback, I modified the text to make the timed vote locking a bit more clear:
Where "question" and "answer" are substitutions.
Did you vote on it and take it back?
That counts as a "vote that cannot be changed"