AllowHtml attribute not working on production - c#-4.0

Question

I have a model that required that html be captured. I have added the [AllowHtml] attribute to the model property and it works correctly on my local server when debugging.
Once deployed to production however, it works correctly when executed on the production server (i.e. I remote onto the server and browse it there), but fails with the the usual "potentially dangerous blah blah blah " message when executed from any other machine.
So it seems to me that there is something to do with the location involved in the validation, or am I completely missing the boat.
Just to confirm, I have made no "special" changes to the web.config.
Please can someone explain why I am having this issue.
Model
[AllowHtml]
[Display(Name = "Overview")]
public string Overview { get; set; }
Controller
//
// POST: /Product/
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult EditFeature(BackOffice.Models.ProductFeature model)
{
if (ModelState.IsValid)
{
//insert the new product
}
//invalid model, return with errors
return View(model);
}
View
#model BackOffice.Models.ProductFeature
#using (Html.BeginForm("AddFeature", "Product", null, FormMethod.Post, new { role = "form", #class = "form-horizontal" }))
{
#Html.AntiForgeryToken()
#Html.ValidationSummary(true)
#Html.Hidden("ProductID", #Model.ProductID)
<div class="modal fade" id="FeatureModal" tabindex="-1" role="dialog" aria-labelledby="FeatureModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h4 class="modal-title">Add a Feature</h4>
</div>
<div class="modal-body">
<div class='form-group'>
<label class='col-lg-2 control-label'>Title</label>
<div class="col-lg-10">
#Html.TextBoxFor(m => m.Title, new { #class = "form-control" })
#Html.ValidationMessageFor(m => m.Title)
</div>
</div>
<div class='form-group'>
<label class='col-lg-2 control-label'>Overview</label>
<div class="col-lg-10">
#Html.TextAreaFor(m => m.Description, 10, 40, new { #class = "ckeditor", id = "overview" })
</div>
</div>
</div>
<div class='clearfix'></div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button type="submit" class="btn btn-primary">Add</button>
</div>
</div>
<!-- /.modal-content -->
</div>
<!-- /.modal-dialog -->
</div>
<!-- /.modal -->
}

Answer 1

There is a mis-match in the method names here. You have
#using (Html.BeginForm("AddFeature", "Product", null, FormMethod.Post, new { role = "form", #class = "form-horizontal" }))
{
}
But Your action method is called
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult EditFeature(BackOffice.Models.ProductFeature model)
{
}
Where is the AddFeature action method?