When I paste text, all the letters are sideways (except for the first line).

When I paste text into the text field, all the letters are sideways (except for the first line). Resetting the program doesn't help. Changing the text orientation (vertical to horizontal) doesn't help. I have this problem in all files I open, and it's been a persistent problem for a long time. I'm using Adobe Illustrator Beta (there's no regular version for my system).