I'm attempting to clone a custom table and receive this error 
[GeneralizedInfo]: This operation is not supported since the object is low-level object.   I've attempted with a custom table with 1-2 fields in it and I've attempted with a custom table with 20-25 fields in it.  Any idea why?  Nothing in the code files really sticks out. Here is the full error:
EventID: 146090 
EventType: E 
EventTime: 3/6/2013 12:03:01 PM 
Source: cms.customtable 
EventCode: CLONEOBJECT 
UserName: user1
IPAddress: ::1 
EventDescription: Message: [GeneralizedInfo]: This operation is not supported since the object is low-level object. 
Stack Trace: 
at CMS.SettingsProvider.BaseInfo.GeneralizedInfoWrapper.ResetChanges(Boolean asUnchanged) 
at CMS.SettingsProvider.BaseInfo.InsertAsClone(CloneSettings settings, CloneResult result, Boolean isRoot) 
at CMS.SettingsProvider.BaseInfo.GeneralizedInfoWrapper.InsertAsClone(CloneSettings settings, CloneResult result) 
at CMSModules_Objects_Controls_CloneObject.CloneObject() in d:\Development\CMSModules\Objects\Controls\CloneObject.ascx.cs:line 498 
at CMSModules_Objects_Dialogs_CloneObjectDialog.btnClone_Click(Object sender, EventArgs e) in d:\Development\CMSModules\Objects\Dialogs\CloneObjectDialog.aspx.cs:line 107
EventUrl: /CMSModules/Objects/Dialogs/CloneObjectDialog.aspx?objectType=cms.customtable&objectId=3475 
EventMachineName: 671-000112785 
EventUserAgent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0) 
EventUrlReferrer: http://localhost/CMSModules/Objects/Dialogs/CloneObjectDialog.aspx?objectType=cms.customtable&objectId=3475