Recently I have been using the notes and highlighting features on my kindle but find that with the notes it takes quite some time to get back to normal and the few times I've highlighted the whole thing has frozen. Anyone else have these problems? Is there anything I can do about it? I checked on my husbands K3 to see if he was also having these problem but both went through with no problems. It's not the end of the world but I would like to use them.