The Collaborative International Dictionary of English v.0.48:

Misstatement \Mis*state"ment\, n.
   An incorrect statement.
   [1913 Webster]

WordNet (r) 3.0 (2006):

misstatement
    n 1: a statement that contains a mistake

Moby Thesaurus II by Grady Ward, 1.0:

73 Moby Thesaurus words for "misstatement":
   abstractionism, bloomer, blooper, blunder, clerical error,
   coloring, confabulation, corrigendum, deformation, distortion,
   equivocation, erratum, error, exaggeration, expressionism,
   fabrication, failure, false coloring, false swearing, falsehood,
   falsification, falsifying, fault, faute, faux pas, gaffe, garbling,
   howler, human error, hyperbole, inaccuracy, injustice,
   lapsus linguae, lie, litotes, misapprehension, miscalculation,
   miscarriage, miscitation, miscoloring, misconception,
   misconstruction, miscount, misdeal, misdrawing, misidentification,
   misinterpretation, misjudgment, mispainting, misplay, misprint,
   misquotation, misreport, misrepresentation, miss, mistake,
   misteaching, misunderstanding, misuse, nonrealism, overdrawing,
   overstatement, perjury, perversion, prevarication, slanting,
   solecism, straining, twisting, typo, typographical error,
   understatement, untruth