When I see a question that has been voted to be deleted, I read "delete (1" instead of "delete (1)" I was used to read before.
This happens on Meta Stack Overflow, and other sites.
I checked the HTML output, and effectively the parenthesis is missing. It is not hidden by two HTML elements that are overlapping each other.
It doesn't happen with the "close" link, for which the closing parenthesis is present.