I don't know how many sects actually do this, but some people have the custom to say a tehfillah which is all about dreams. In it we ask Hashem to make all our good dreams come true whether "...I have dreamed about others, or myself, or that others have dreamed about me...".
This Tehfillah is said during Birchas Kohanim on Yom Tov (not during a regular Shabboss in Eretz Yisroel). My question is, why do we ask about dreams of all things when the Kohanim are blessing us?