Behaves slightly different in IE and FF.
This is one scenario (for Guessing and Typing games):
1. Play Guessing Game without sign up
2. Click on a word, observe Continue arrow appear
3. Click Login at bottom or at left "Results were not saved..."
4. Start typing into Username field (if it already has a username - select it and overwrite)
5. Notice that underneath this popup a next word with a list of word to guess appears as if Continue was clicked.
Expected: Continue arrow stays and doesn't interfere with login process.
Note: similar happens with Typing game.
Matching Game:
1. Play Matching Game without sign up
2. Arrange the words on the right so they are in the wrong or partially wrong order
3. Click Submit and observe wrong words appear in pink
4. Click Login at bottom "Results were not saved..."
4. Move the mouse to start typing the username - slowly
5. Notice that as the mouse moves over wrong words in pink - the Login pop-up disappears.
Note that this doesn't happen if all matched words are correct - hence this pop-up interferes with pop-up with correct word.
Mix Game (intermittent but highly reproducible)
1. Play Mix Game without sign up
2. Click on a word, observe Continue arrow appear - or type a word - or arrange words (depends on a game; the idea is play it and try Login right after, not after clicking Continue)
3. Click Login at bottom or at left "Results were not saved..."
4. Start typing into Username field (if it already has a username - try selecting it and overwrite)
5. Notice that this popup disappears and next page with a next word(s) loads.
