Problems in Ruby-style when key is one-char length

[tokland]

This does not work for me (using current master):

<label>person.ruby[field2][foo]<input type="text" name="person.ruby[field2][f]" value="baz" /></label>

Note that I use "f" instead of "foo". I get "Uncaught TypeError: Object #<Object> has no method 'push'"

[mikeymckay]

I am hitting this one as well. Example can be seen here: http://jsfiddle.net/ZfxNV/