THIS NO LONGER WORKS, IF IT EVER DID :(
When you add a link to safari, it replaces the link to dropbox with an actual file, outside of dropbox so breaks the syncing.
The Original Syncing Idea was :
Once setup only the bookmarks from the first machine will be available after that bookmarks should be kept in sync.
Create a backup of the original file then copy to dropbox, then create a link back to the original location. Todo this from
/Application/Utitlities/Terminal.app run these commands:
cp ~/Library/Safari/Bookmarks.plist ~/Library/Safari/Bookmarks.plist.backup mv ~/Library/Safari/Bookmarks.plist ~/Dropbox ln -s ~/Dropbox/Bookmarks.plist ~/Library/Safari/Bookmarks.plist
On secondary machines, which will initially only have the first computers bookmarks.
mv ~/Library/Safari/Bookmarks.plist ~/Library/Safari/Bookmarks.plist.backup ln -s ~/Dropbox/Bookmarks.plist ~/Library/Safari/Bookmarks.plist
Original ideas is from here