Barry, Doing the update seams to do it for me. I have AC running on 3 different MACs.

Barry, This is only a MAC & Archicad issue, correct? In my case editing text while having caps on does not always crash my machine. Do you know if there's a fix for this yet?

There's a new update that I just download today. Hopefully this will fix the issue.

This seams to work!!!. thank you 

I narrowed it down, and i believe is only happening when I try to delete text. But if i highlight the complete text and type over it, my machine will not crash.