Hmm. Here, neither Safari 2 nor Safari 3 have ever opened Word docs
regardless of whether I have "automatically open safe files" set in
prefs.
Colour me blonde!
I never have that pref set, because it is an attack vector. There is
safe and there is safe. Not even jpgs are completely safe.
I expect to click on the ref to the Word doc and have Safari download
it to my downloads folder. To be safe, I right-click on any such links
and select "Download Linked File" to give me every possible chance to
catch naughtiness before it spreads. I might even drag it to my sandbox
account's drop box and open it from there, away from all my good stuff.
On the other hand, I can't find a way to stop mail opening a Word
attachment. Unlike .pdf it won't automatically display Word docs in
line, but I can double-click on the attachment reference in the mail
message, and Word will fire up and open it.