Printable View
Ever since the new engine. Like right now, I don't have a cursor. Even if I click back on the period there, when I start typing, the letters appear at the end of my text. I can't edit. The situation is somewhat better if I use the Advance Editing feature. Fix? (Firefox 3.x). I can't even delete something, even though I can highlight it.
Try clicking on the leftmost button (the one that looks like A/A). This toggles you between WYSIWYG mode and the "plaintext with visible tags" mode.
I have exactly the same problems you describe if I'm in WYSIWYG mode -- no cursor, and new letters appear at the end of text. But in "visible tags" mode, everything is fine. (Unfortunately, you always start in WYSIWYG mode by default, which is rather annoying.)
Aha, omg it works!! Tnx a bunch, neighbor!