right_radios.html

<div ng-repeat="m in milestone_choices" class="row-fluid">
    <label><input type="radio" name="meaningless" ng-value="$index" ng-model="milestone_data.index" />
    &nbsp;<span ng-bind="m.title"></span></label>
</div>

right_radios.js

$scope.milestone_data = { index: 0 };

select.html

<input name="milestone" type="hidden" ng-value="repo.name + '--milestone--' + milestone.number"/>
<select ng-show="milestone_choices.length"
        ng-model="milestone" ng-options="m.title for m in milestone_choices">
</select>

wrong_radios.html

<div ng-repeat="milestone in milestone_choices" class="row-fluid">
    <input type="radio" ng-model="milestone" name="milestone" ng-value="repo.name + '--milestone--' + milestone.number" ng-model="milestone"/>
    &nbsp;<span ng-bind="milestone.title"></span>
</div>