Screen garble and duplicated text

I had a panicked moment last week where I put a hard return in a chapter I was working on and the text went all crazy and overlapped itself, duplicated a few sentences too. I undid my last edit and it returned to normal. Did it again today, only this time typing in any text gave me the garble once it started. Exported to doc file and working with that, because losing an 80k m/s would take all the fun out of the organization Scrivener brings. Anyone else have this problem or know how to make things stable again?

This sounds more like a display anomaly than actual corruption of your project. What version of Scrivener and what version of Mac OS?