Hi Vero,
thanks for your reply.
There's an error in Console:
osascript[79129]: Performance: Please update this scripting addition to supply a value for ThreadSafe for each event handler: "/Library/ScriptingAdditions/SIMBL.osax"
I have SIMBL installed because I use the SafariStand plugin which give me favicons in Safari tabs and daily download folders. Will probably in the future have to do without it.