Not so far- I always keep a log ( typical teacher) and she started this 'out of the blue' 10 days ago. Has gone down about 8.30pm on all occasions except 2 nights that were 9pm. So far she seems fine on this amount of sleep- no problems in the day and no fuss going to bed- in fact, she hardly notices when I walk out now! The only difference I know to have caused this is that she requested a little book to go to bed with the night she started chatting. She lays down patting the book saying 'my book, Izzy book'! I know for sure she is reading the book - probably sat up, when I listen to her. She is heavily into 'reading' her own books at the moment- a real miss independent. I feel pretty comfortable with all this but don't want to be making a terrible mistake- I have been caught out in the past!