Spilled salt
Salt fallen from the cellar onto the table — a minor accident with a long superstitious tail.
Spilled salt in a dream is the dream's image of a small kitchen accident that, in folklore, has always been read as a warning. The amount is trivial; the omen is heavy. The dream brings spilled salt when something in your life — a slip, a careless word at a meal, a small discourtesy — is being read by another party as a much larger sign than it was. A spill quickly swept up, with the right small gesture, is the dream telling you the misread can still be corrected. A spill left and not acknowledged is the dream noting that the small accident is now being given the full weight of an omen, and the table will not let it go.