Since the downtime of yesterday, 2013-01-03, I've noticed some odd behavior in editing notes. The first time the backspace key is tapped (I'm using an iPad, so I don't know if that makes a difference) it erases one character before the cursor. When it's tapped after that, though, it seems to erase two characters - not all of the time, but the majority of the time. I don't know if there's a better place to report this.