Red wavy lines

i also noticed that there is again increasing red wavy lines recently. for instance:

    val v3 = v0 ) { implicit w =>
       w.list = w.list.drop( 1 )

although this compiles fine, the plugin thinks i'm doing something wrong here with the closure:

Screen shot 2011-04-09 at 18.21.08.jpg

the trait involved defines in as:

    trait KEProjector[ A ] extends ... {
       def in[ R ]( v: Path )( fun: A => R ) : R


(where A in this case is World[Path])

with using this DSL, i get the red wavy lines all across my sources...

thx, -sciss-