I just installed the Java update & LW 5 OK buttons seem to work fine.

Stief might have ideas.

I'd wait on LW to see if in fact it is a bug.

Which machine model are you running may I ask?

Oh a late thought, are you sure you are logged in as Admin.? If not logged into an Admin account you 'might' not have permissions to change preferences. That I"m not sure about.

I am the administrator (its not a shared computer), and its an imac (the one before the latest ones) with a 2.16 ghz intel core 2 duo processor and I have a lot of free space on it. My older limewire worked perfectly (the 4.watever one/s) so i know that its not just my computer and I did install limewire from limewire.com (the latest version).