According to the tale told a few weeks ago a local Habad Rabbi named Eliyahu Kenterman gave the mother of Gilad Shalit a dollar he had received many years ago from the Lubavitcher Rebbe z"l. Gilad Shalit's mother kept the dollar and carried it everywhere in her purse. On the day when Gilad was released (20th of tishrei) she happened to look at the dollar and saw that on the dollar was written "Tuesday the 20th of Tishrei - May you have success at all your ventures!".
Well seems the story is true. Ynet has this picture up of the miraculous dollar bill:
Weirdly I can't see the supposed blessing on the dollar, but I think this is close enough to be considered a true story.