There's definitely something flaky about this. I tried the following:
1. Started Word with the /a switch, and previews suddenly worked.
2. Deleted the .pip file for Word, and previews suddenly worked. Closed
Word, it created a new .pip file, and restarted, and previews no longer
worked. Deleted the pip file, and previews still didn't work. (I had tried
renaming various parts of the Word tree in the registry, then renaming
normal.dot and normal.dotx, none of which had any effect. Only renaming the
pip file seemed to have any effect... but it stopped having an effect rather
quickly.)
3. Tried previews for doc/docx files from Excel... and they worked! But,
only briefly. After starting/restarting Excel several times. previews for
some Word files continued to work, but stopped working for others.
Eventually, previews stopped working.
4. Rebooted, then tried Word with the /a switch. Previews didn't work.
5. Started Word normallly. Previews suddenly worked!
This is all very flaky. Something is deeply disturbed about all this, since
it's 12:30 am, I'm going to leave it til tomorrow.
Best advice... try rebooting and see if previews work. If they do, then
you're having the same flaky performance I'm having.
--
Herb Tyson MS MVP
Author of the Word 2007 Bible
Blog:
http://word2007bible.herbtyson.com
Web:
http://www.herbtyson.com