While composing my post about Ireland in Passages & PLaces, when I reached about the 4th paragraph, the fresh material disappeared off the bottom of the window I was typing in. It was possible to scroll the window down to see what had been typed but as soon as I resumed typing, the visible window was about 2 lines higher up than where typing appeared.
When I pressed preview, I got the meassage
The submitted form was invalid. Try submitting again.
at the top of the message with the typing box visible but no preview. It submitted OK after making some changes.
It's IE 8.0.76 on a natty new netbook.
p.s. No such problems with this post.
I've had the same problem. Once the wee box is full, you are typing 'blind' - maybe Nick is trying to improve our keyboard skills.
Funnily enough, it isn't happening yet with this post, despite the fact that your 'quoted' message is filling the wee box.
The lines are scrolling up, just as you might expect, with the line being typed at the bottom of the box.
BTW, I've learnt through bitter experience to do a control 'C' of the entire post before trying to submit, just in case it goes pear shaped.
Have to admit that it's been very stable for a while now, although it often fails to submit on the first attempt, the text isn't lost and it goes OK on the second attempt.
Another trick with a long post is to write it first in Word / Notepad / OpenOffice and then cut and paste into BM.