I read this question and I know that this not happens, if I use pdf viewers like evince or okular, but now I use FoxitReader because is lightweight and because I have Fedora 15 spin with LXDE and this edition uses epdfview (that I don't like) for default. Therefore, I uninstalled epdf and I'm happy with Foxit, but when I'm using kile and each time that I compiled a document, kile opens a new pdf.
Then my question is: This happens me for the choice of FoxitReader or is a problem of kile's configuration? How can I fix this problem? Thanks in advance