Suppose: I'm pasting a file on remote host (SFTP). And if "Replace file?" dialog appears it takes destination file's data (file size, access date) from cache. Cache wasn't updated before but data might changed. It's applicable to other operations, maybe. See also: bug #16030.
Duplicate of bug 12569?
Seems so. *** This bug has been marked as a duplicate of bug 12569 ***