Strange Man error

anyone seen this? [MyComputer:~] ME% man pdisk mdoc warning: Unknown list type `-compact' (or missing list type) in .Bl request Usage: .Bl {-hang | -ohang | -tag | -diag | -inset} [-width <string>] [-offset <string>] [-compact] .Bl -column [-offset <string>] <string1> <string2> ... .Bl {-item | -enum [-nested] | -bullet | -hyphen | -dash} [-offset <string>] [-compact] (#42) mdoc error: .It without preceding .Bl (#43) mdoc warning: .It requests in lists of type `' require arguments (#43) mdoc error: .It without preceding .Bl (#45) mdoc warning: .It requests in lists of type `' require arguments (#45) mdoc error: .It without preceding .Bl (#47) mdoc warning: .It requests in lists of type `' require arguments (#47) mdoc warning: extraneous .El call (#49)