You have found a bug associated with validated upload fields... I logged it and it will be fixed. I know you shouldn't have to update the code, but that is the way to fix it at this point until we have an update out.
I'm not aware of any issues with copying and pasting from a browser, but I'll email it to you as well if you want to post your email address. Maybe try another browser... nobody has ever complained of not being able to copy and paste before.