"press this" bookmarklet problem

Hello,
the “press this” bookmarklet doesn’t work properly:
I put the button on my preferred bar on Safari 8.0.4 and when i click on it opens a new window with the article but it doesn’t show video or images to embed and after few seconds it logs me out from my wordpress site.
The log in form appear in the new article, but when i sign in with my credits, it doesn’t let me log in, i have to close the new window and the log in from my wordpress site.
Can you help please?
Thank You.
Lorenzo.

this is the bookmarklet code:

[ Moderator note: Code fixed, please wrap code in backticks or use the code button. ]

javascript:var d=document,w=window,e=w.getSelection,k=d.getSelection,x=d.selection,s=(e?e():(k)?k():(x?x.createRange().text:0)),f='http://www.lorenzofelicioni.it/wp-admin/press-this.php',l=d.location,e=encodeURIComponent,u=f+'?u='+e(l.href)+'&t='+e(d.title)+'&s='+e(s)+'&v=4';a=function(){if(!w.open(u,'t','toolbar=0,resizable=1,scrollbars=1,status=1,width=720,height=570'))l.href=u;};if (/Firefox/.test(navigator.userAgent)) setTimeout(a, 0); else a();void(0)