Safari 140 Quick Fix
I love Safari 140. Unfortunately, it does not work when Safari is running in 64-bit mode. I also love Tweetie. So to get similar functionality of Safari 140 I use my Tweet bookmarklet to tweet the current page using Tweetie. If you don't use Tweetie, this Tweet bookmarklet will open the Twitter status update page with the current page title and url.
I would recommend making this one of your first 10 bookmarks in your Bookmark Bar. This will let you use the CMD+N keyboard shortcut to trigger the bookmarklet if it is the Nth shortcut.