I'm not able to figure out what happend to cause this, as far as I can tell, things were working just fine and then when I went to edit a form, I am getting a YSOD.

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
   Umbraco.Forms.UI.Usercontrols.EditForm.RenderField(Object sender, RepeaterItemEventArgs e) +811
   System.Web.UI.WebControls.Repeater.OnItemDataBound(RepeaterItemEventArgs e) +115
   System.Web.UI.WebControls.Repeater.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem) +138
   System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource) +478
   System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) +61
   System.Web.UI.WebControls.Repeater.DataBind() +76
   Umbraco.Forms.UI.Usercontrols.EditForm.RenderFieldset(Object sender, RepeaterItemEventArgs e) +405
   System.Web.UI.WebControls.Repeater.OnItemDataBound(RepeaterItemEventArgs e) +115
   System.Web.UI.WebControls.Repeater.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem) +138
   System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource) +478
   System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) +61
   System.Web.UI.WebControls.Repeater.DataBind() +76
   Umbraco.Forms.UI.Usercontrols.EditForm.RenderPage(Object sender, RepeaterItemEventArgs e) +405
   System.Web.UI.WebControls.Repeater.OnItemDataBound(RepeaterItemEventArgs e) +115
   System.Web.UI.WebControls.Repeater.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem) +138
   System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource) +478
   System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) +61
   System.Web.UI.WebControls.Repeater.DataBind() +76
   Umbraco.Forms.UI.Usercontrols.EditForm.Page_Load(Object sender, EventArgs e) +1051
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +91
   System.Web.UI.Control.LoadRecursive() +74
   System.Web.UI.Control.LoadRecursive() +146
   System.Web.UI.Control.LoadRecursive() +146
   System.Web.UI.Control.LoadRecursive() +146
   System.Web.UI.Control.LoadRecursive() +146
   System.Web.UI.Control.LoadRecursive() +146
   System.Web.UI.Control.LoadRecursive() +146
   System.Web.UI.Control.LoadRecursive() +146
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207

I have multiple forms in Contour ranging in size and complexity and up until an hour ago, they were working jut find.  I just went back into one of the forms to add another field and this is what I am getting.  No one else has been working on them, so I really can't pinpoint what happened to cause this.

Help!