I stay signed in toMumsnet (premium subscriber) pretty much all the time and have been following the thread on IndiaWilloughby/JKR but it seems the site has logged me out for just this thread.
The OP's post now comes up in a different colour and it runs to 12 (presumably short) pages according to the site. And worst of all it's littered with adverts!
It is also telling me I need to log in to make a comment.