This seems to be the only event in the event log table for yesterday -- minus the differnce in GUID:

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<LogProperties><LogProperty><PropertyName>ModuleId</PropertyName><PropertyValue>-1</PropertyValue></LogProperty><LogProperty><PropertyName>ModuleDefId</PropertyName><PropertyValue>-1</PropertyValue></LogProperty><LogProperty><PropertyName>FriendlyName</PropertyName><PropertyValue /></LogProperty><LogProperty><PropertyName>ModuleControlSource</PropertyName><PropertyValue /></LogProperty><LogProperty><PropertyName>AssemblyVersion</PropertyName><PropertyValue>5.1.0</PropertyValue></LogProperty><LogProperty><PropertyName>PortalID</PropertyName><PropertyValue>0</PropertyValue></LogProperty><LogProperty><PropertyName>PortalName</PropertyName><PropertyValue>Rough Trade Gaming Community (RTGC)</PropertyValue></LogProperty><LogProperty><PropertyName>UserID</PropertyName><PropertyValue>-1</PropertyValue></LogProperty><LogProperty><PropertyName>UserName</PropertyName><PropertyValue /></LogProperty><LogProperty><PropertyName>ActiveTabID</PropertyName><PropertyValue>36</PropertyValue></LogProperty><LogProperty><PropertyName>ActiveTabName</PropertyName><PropertyValue>Home</PropertyValue></LogProperty><LogProperty><PropertyName>RawURL</PropertyName><PropertyValue>/default.aspx</PropertyValue></LogProperty><LogProperty><PropertyName>AbsoluteURL</PropertyName><PropertyValue>/default.aspx</PropertyValue></LogProperty><LogProperty><PropertyName>AbsoluteURLReferrer</PropertyName><PropertyValue /></LogProperty><LogProperty><PropertyName>UserAgent</PropertyName><PropertyValue>Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/530.5 (KHTML, like Gecko) Chrome/2.0.172.33 Safari/530.5</PropertyValue></LogProperty><LogProperty><PropertyName>DefaultDataProvider</PropertyName><PropertyValue>DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider</PropertyValue></LogProperty><LogProperty><PropertyName>ExceptionGUID</PropertyName><PropertyValue>473d1740-13b9-4060-96eb-28df90b393d4</PropertyValue></LogProperty><LogProperty><PropertyName>InnerException</PropertyName><PropertyValue>The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.</PropertyValue></LogProperty><LogProperty><PropertyName>FileName</PropertyName><PropertyValue /></LogProperty><LogProperty><PropertyName>FileLineNumber</PropertyName><PropertyValue>0</PropertyValue></LogProperty><LogProperty><PropertyName>FileColumnNumber</PropertyName><PropertyValue>0</PropertyValue></LogProperty><LogProperty><PropertyName>Method</PropertyName><PropertyValue>System.Web.UI.ControlCollection.Add</PropertyValue></LogProperty><LogProperty><PropertyName>StackTrace</PropertyName><PropertyValue /></LogProperty><LogProperty><PropertyName>Message</PropertyName><PropertyValue>DotNetNuke.Services.Exceptions.ModuleLoadException: The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases. ---&gt; System.Web.HttpException: The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.
  at System.Web.UI.ControlCollection.Add(Control child)
  at DotNetNuke.UI.Utilities.MSAJAX.Register(Page objPage)
  at DotNetNuke.UI.Utilities.MSAJAX.RegisterClientScript(Page objPage, String Path)
  at DotNetNuke.UI.Utilities.ClientAPI.RegisterClientScriptBlock(Page objPage, String key)
  at DotNetNuke.UI.Utilities.ClientAPI.RegisterClientScriptBlock(Page objPage, String key, String strScript)
  at DotNetNuke.UI.Utilities.ClientAPI.RegisterClientReference(Page objPage, ClientNamespaceReferences eRef)
  at DotNetNuke.UI.Utilities.ClientAPI.RegisterClientReference(Page objPage, ClientNamespaceReferences eRef)
  at DotNetNuke.UI.Utilities.DNNClientAPI.EnableMinMax(Control objButton, Control objContent, Int32 intModuleId, Boolean blnDefaultMin, String strMinIconLoc, String strMaxIconLoc, MinMaxPersistanceType ePersistanceType, Int32 intAnimationFrames, String strPersonalizationNamingCtr, String strPersonalizationKey)
  at DotNetNuke.UI.Utilities.DNNClientAPI.EnableMinMax(Control objButton, Control objContent, Int32 intModuleId, Boolean blnDefaultMin, String strMinIconLoc, String strMaxIconLoc, MinMaxPersistanceType ePersistanceType, Int32 intAnimationFrames)
  at DotNetNuke.UI.Utilities.DNNClientAPI.EnableMinMax(Control objButton, Control objContent, Int32 intModuleId, Boolean blnDefaultMin, String strMinIconLoc, String strMaxIconLoc, MinMaxPersistanceType ePersistanceType)
  at DotNetNuke.UI.Utilities.DNNClientAPI.EnableMinMax(Control objButton, Control objContent, Boolean blnDefaultMin, MinMaxPersistanceType ePersistanceType)
  at DotNetNuke.UI.UserControls.LabelControl.Page_Load(Object sender, EventArgs e)
  --- End of inner exception stack trace ---</PropertyValue></LogProperty><LogProperty><PropertyName>Source</PropertyName><PropertyValue /></LogProperty></LogProperties>

I would say the key issue is: 

DotNetNuke.UI.UserControls.LabelControl.Page_Load

is that object this object creates the resulting error message.  which is a DNN control that caused the cascading stack dump during the said data bind.

Seems i'm not the only one who's exprienced this: 

http://www.dotnetnuke.com/Community/Forums/tabid/795/forumid/-1/postid/316578/scope/posts/Default.aspx

Only a couple posting about this that seem to be relevant

• http://forums.asp.net/t/969863.aspx  -- basicly talking about using the wrong level of controls' for adding new controls
• http://www.west-wind.com/weblog/posts/5758.aspx  -- talks more about the embedding of older asp type language <%= %> into controls that were being added.. instead saying it should be switched to the databinding style <%# %>