What about this solution ?:
http://jsfiddle.net/uuzVN/2/
.twitter-typeahead{
width: 97%;
}
.tt-dropdown-menu{
width: 102%;
}
input.typeahead.tt-query{
width: 300px !important;
}
You just need to fine tune the width to the template that you are using in a real project. I adapted it for the iframe violin.
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