I have a site, where when i move pages i get the following error

[code]
Server Error in '/' Application.
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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.content.PublishNodeDo(Document d, XmlDocument xmlContentCopy) +445
umbraco.content.PublishNode(Document d) +224
umbraco.content.PublishNode(Int32 documentId) +72
umbraco.library.PublishSingleNodeDo(Int32 DocumentId) +43
umbraco.library.PublishSingleNode(Int32 DocumentId) +137
umbraco.dialogs.moveOrCopy.HandleMoveOrCopy(Object sender, EventArgs e) +1674
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +111
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +110
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565




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Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053


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The page is actually moved, but when i save and publish it after having moved it, i get another error. Only if i republish the entire site, it will return to a functional state.

Any ideas?

its umbraco 3.05