Why am I getting an unexpected token error in jQuery 1.4.4.min?

Question

Why am I getting an unexpected token error in jQuery 1.4.4.min?

Why am I getting this error:

Uncaught SyntaxError: Unexpected token <
c.b.extend.globalEval                          jquery-1.4.4.min.js:32
c.extend.httpData                              jquery-1.4.4.min.js:144
c.extend.ajax.L.w.onreadystatechange           jquery-1.4.4.min.js:140

This error does not tell me the place in my JS that causes this problem. Just a minQuery file.

How can I debug this and fix it?

Edit1: Here are some screenshots of my call stack around this error. However, it's still not sure which file has the syntax error caused by jQuery.

enter image description here

Edit 2:

Here are some of my AJAX calls:

$('form#project-ajax-form').submit(function(){
    if(compv.steps.selectedClient.id != null){
    $('input#project_client_id').val(compv.steps.selectedClient.id);
        console.debug("Project Client Value: " + $('input#project_client_id').val());
        return true;
    }
    console.debug("Project Client Value not found");
    compv.tools.clientError();
    return false;
});    
$('#project-ajax-form')
        .bind("ajax:success", function(evt, data, status, xhr){
        compv.updateStepView('project', xhr);
});

$('#client-ajax-form')
    .bind("ajax:success", function(evt, data, status, xhr){
    console.log("Calling Step View");
    compv.updateStepView('client', xhr);
});

$('form#stage-ajax-form').submit(function(){
if(compv.steps.selectedProject.id != null){
$('input#stage_project_id').val(compv.steps.selectedProject.id);
    console.debug("Stage Project Value: " + $('input#stage_project_id').val());
    return true;
}
console.debug("Stage Project Value not found");
compv.tools.clientError();
return false;
});
$('#stage-ajax-form')
    .bind("ajax:success", function(evt, data, status, xhr){
    compv.updateStepView('stage', xhr);
});

$.ajaxSetup({
  beforeSend: function(xhr) {
    xhr.setRequestHeader("Accept", "text/javascript");
  }
});

$('.ajax-form')
.bind("ajax:success", function(evt, data, status, xhr){
  var $form = $(this);
    console.log("Form Success: %s", $(this).attr('id'));

  // Reset fields and any validation errors, so form can be used again, but leave hidden_field values intact.
  $form.find('textarea,input[type="text"],input[type="file"]').val("");
  $form.find('div.validation-error').empty();
})
.bind("ajax:failure", function(evt, xhr, status, error){
  var $form = $(this),
      errors,
      errorText;
    console.log("Form Failure: %s", $(this).attr('id'));

  try {
    // Populate errorText with the comment errors
    errors = $.parseJSON(xhr.responseText);
  } catch(err) {
    // If the responseText is not valid JSON (like if a 500 exception was thrown), populate errors with a generic error message.
    console.error("Server Error for Form: %s", $(this).attr('id'));
    errors = {"Server Error": "Please reload the page and try again"};
  }

  // Build an unordered list from the list of errors
  errorText = "There were errors: \n<ul>";

  for ( error in errors ) {
    errorText += "<li>" + error + ': ' + errors[error] + "</li> ";
  }

  errorText += "</ul>";

  // Insert error list into form
  var errorDiv = $form.find("div.validation-error");
  errorDiv.html(errorText);
  errorDiv.show(300);
});