If you are unable to see the shapes in the login, but are seeing squares with the word RELOAD instead, that indicates a problem with your web browser: specifically, that your browser is caching old information.  To solve this problem, clear your browsing history.  The exact method used for this depends on which browser you are using.

INTERNET EXPLORER

1. Press CTRL + Shift + DEL to open the Clear Browsing History window.
   
2. Click the Delete button to clear your browsing history.

FIREFOX

1. Press CTRL + Shift + DEL to open the Clear All History window.
   
2. Select a time range to clear.  If you were successful recently at logging in, you can probably just clear the last day's history, but if you have not successfully logged on in a while, you should take the default and clear the entire browsing history.
   
3. Click the Clear Now button.
   

1. Press CTRL + Shift + DEL to open the Clear Browsing Data Window.
   
2. In the Clear Browsing Data window, check the Empty the Cache checkbox.
   
3. Select a time range to clear.  If you were successful recently at logging in, you can probably just clear the last day's history, but if you have not successfully logged on in a while, you should take the default and clear the entire browsing history.
   
4. Click the Clear Browsing Data button.
   

1. Click on the gear icon which is located near the top-right side of the browser window.
   
2. Click the Reset Safari... link.
   
3. In the window, uncheck all the checkboxes but the Clear History.
   
4. Click Reset.