Andrew,
It happened to me just the other day too. But it's OK now, I adjusted the
acceleration down one notch from full, then returned to the same document and
the pictures were fine. Then I turned the aceleration back to full, restart
my computer. No more problem.
This happened one time before when I opened the document from my folders
instead of from the most recent document listing on the right hand side pane.
What I did was closed word and reopen, then pick from the listing instead of
from the folder, no more problem.
When it happened this time, I did open from the listing, but I had renamed
the document and it could not find the path and the problem reoccured. That's
why I adjusted acceleration one notch down, back to full and restart. It has
been fine since then. And I have no idea why it only works that way, but so
far it's back to normal. Can anyone figured this one out?