Since an update to OS 10.9 on a mid 2012 MBP 2.7 GHz i7 with 16 GB Ram, CS5 is not allowing me to update text. When I select the text tool type text and then return to the text and highlight it to change font or style, the text disappears, and is actually deleted. This happens when I select any text in any of my psd files, or when I create new files.