Created attachment 105701 [details]
A simple Word 2003 Document with a working Merge field. When resaved you will see the merge field will lose it's highlight and cease being able to merge.
Steps to reproduce:
1. ....Open and existing Word 2003 Document with a Merge Field
2. ....Make Resave the document and chose Word 2003
3. ....Check the documents Merge Field and find it no longer functions
The Merge Field turns to text and loses it's database cabilities. When the merge function runs the field is ignored and nothing the expected items do not merge.
The field should show as highlighted as when first opened. When it's saved with or without any changes made the highlight of the field is lost and the merge ceases working.
Operating System: Windows 8
Version: 220.127.116.11 release
The problem also occurs in version 18.104.22.168
Thanks for reporting. It's an already filed bug (and as far as I am aware as old as OpenOffice.org).
*** This bug has been marked as a duplicate of bug 67207 ***