Security Token Expired Login

If I stayed logged in for long periods of time, I am finding that my security token expires and requires me to login again. Fair enough. However, the login prompt I receive does not allow enough characters for me to type in my full login name.? It appears to be limiting the input to 15 characters. The Sign In from the main page allows 70 characters for the login/user name. This is a minor annoyance, but it is annoying.