What part of speed grader are you trying to copy into? Also, what type of assignment? is it a regular assignment? or a Quiz? Are you using a rubric?
I have not had problems copying information into any of the comment areas in speed grader or in the rubrics. So, please provide a little more detail as to what is not working for you.
I put some questions in a first assignment to try to get phone numbers and other similar info. I would rather cut and paste it from the text boxes than re-type it, so I'm less likely to make a mistake.