Commented Unassigned: Update citations and Bibliography Hanging [11212]

I have a large document in Word 2007, with approximately 900 citations.

Every time I attempt to "update citations & bibliography" it hangs.

I have run it in word safe mode. I have run the pc in safe mode. I have run it without backup, without autosave, without antivirus. I have disabled screensavers. I ran the office repair - no change. All to no avail.

It takes several hours to fall over, and the couple of times I watched the winword process memory usage, i saw it fall over at about the same memory use - about 1.8Gb. This computer still shows only 60% memory used so it's not like it's running out of RAM/swap space. It's behaving like an internal coding hard-limit on memory allocation was reached.

All the event viewer shows me is:
Faulting application winword.exe, version 12.0.6668.5000, stamp 5083137f, faulting module mso.dll, version 12.0.6662.5000, stamp 4fd67dd1, debug? 0, fault address 0x00b12066.

Is anyone else having this issue?
Is this fixed in Word 2010 or 2013?
Does anyone have any suggested workarounds?
Comments: ** Comment from web user: fredtheweasel **

I just saw that Visio has:-

applicaton.UndoEnabled = False

which would be perfect - but that isn't available in word.