Error message in column default metadata settings: startIndex cannot be larger than length of string (log attached)

I have one SP2010 (enterprise) document library which gives me an "unexpected error" message if I click on "column default value settings" in the settings. Other document libraries' column default value settings are working fine. I use managed metadata and created libraries from templates. I deleted all custom columns from the site, only title is left over (content types are document and link to a document) but the error still shows up. How can I fix this?

Here is the log:

System.ArgumentOutOfRangeException: startIndex cannot be larger than length of string.  Parameter name: startIndex  

at System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length, Boolean fAlwaysCopy)   

at Microsoft.Office.DocumentManagement.MetadataNavigation.PerLocationViewManager.HumanReadablePath(SPList list, Guid fieldId, String uniqueNodeId, String pathDelimiter)   

at Microsoft.Office.Server.WebControls.MetaDataNavTree.TreeViewDataBound(Object sender, EventArgs e)   

at System.Web.UI.WebControls.BaseDataBoundControl.OnDataBound(EventArgs e)   

at System.Web.UI.WebControls.HierarchicalDataBoundControl.PerformSelect()   

at Microsoft.Office.DocumentManagement.MetadataNavigation.MetadataNavigationContext.OnTreeViewLoad(SPTreeView spTreeView)   

at Microsoft.Office.Server.WebControls.MetaDataNavTree.PerLocationPageLoad()   

at Microsoft.Office.DocumentManagement.Pages.ColumnDefaultsPage.OnLoad(EventArgs e)   

at System.Web.UI.Control.LoadRecursive()   

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Application error when access /_layouts/ColumnDefaults.aspx, Error=startIndex cannot be larger than length of string.  Parameter name: startIndex 

at System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length, Boolean fAlwaysCopy)   

at Microsoft.Office.DocumentManagement.MetadataNavigation.PerLocationViewManager.HumanReadablePath(SPList list, Guid fieldId, String uniqueNodeId, String pathDelimiter)   

at Microsoft.Office.Server.WebControls.MetaDataNavTree.TreeViewDataBound(Object sender, EventArgs e)   

at System.Web.UI.WebControls.BaseDataBoundControl.OnDataBound(EventArgs e)   

at System.Web.UI.WebControls.HierarchicalDataBoundControl.PerformSelect()   

at Microsoft.Office.DocumentManagement.MetadataNavigation.MetadataNavigationContext.OnTreeViewLoad(SPTreeView spTreeView)   

at Microsoft.Office.Server.WebControls.MetaDataNavTree.PerLocationPageLoad()   

at Microsoft.Office.DocumentManagement.Pages.ColumnDefaultsPage.OnLoad(EventArgs e)   

at System.Web.UI.Control.LoadRecursive()   

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)