On the user profile page, under "Impact", you can see the amount of votes you have cast. When you mouse over the number, there is a rollover description.
However, when I click on the number, this takes me to a more in-depth description of these votes. The in-depth feedback suggests that this number does not only represent up and down votes; it also represents votes to close, delete, undelete or open a question.
I know that the show tally includes all of these votes, as I only have roughly 1100 votes listed under upvotes and downvotes, and must include delete votes and reopen votes to reach the original number.
From this point of view, a rollover description that only mentions up and downvotes is a bit misleading. Could we ammend the "votes cast" rollover description to include all votes included in this tally? We could be more generic, and simply mention that it is "the total number of cast votes", or we could be more detailed, and simply include the additional vote types.
Total number of votes cast.
Total number of votes cast, including upvotes, downvotes, delete votes, undelete votes, close votes and reopen votes.
It has since been pointed out that the confusion comes from a differant value I have been looking at; please read below.
As it has since been pointed out, this number includes posts that are not otherwise counted, when I explicitly look at a particular type of votes. For example, my user profile shows that I have cast 908 downvotes, but my downvotes page explicitly states that I have only cast 518 downvotes. Perhaps this could be cleared up by stating that the indepth display does not show all votes. Something like "908 total votes, 518 shown".