R help - Jun 2009 - S4: Bug in group method defenition ("Compare")

Dear UseRs,

Setting methods for groups ("compare" in this case) does not work  
properly. Once one method is set ,redefining it or even removing does not  
change the behavior:

  setClass("foo"
           ,representation(range="numeric")
  )
#[1] "foo"

  setMethod("Compare",c(e1="ANY",e2="foo"),
	 function(e1,e2){
	 browser()
	 callGeneric(e1,e2 at range)
})
  #[1] "Compare"
  o<-new("foo",range=c(1,2))
  2>o
#Called from: 2 > o
#Browse[1]>
#[1]  TRUE FALSE  ##Enters browser as expected !!!

# Now, remove browser()
  setMethod("Compare",c(e1="ANY",e2="foo"),
	 function(e1,e2){
	 callGeneric(e1,e2 at range)
  })

  2>o
#Called from: 2 > o
#Browse[1]>   ######## Oups, the old function is executed here?????????  
########
#[1]  TRUE FALSE

  selectMethod(">=",c(class(2),class(o)),optional=T)  ### Shows
real
method!!!!!
#function (e1, e2)
#{
#    callGeneric(e1, e2 at range)
#}
#
#Signatures:
#        e1        e2
#target  "numeric" "foo"
#defined "ANY"     "foo"

  removeMethod("Compare",c(e1="ANY",e2="foo"))
#[1] TRUE

  2>o
##Called from: 2 > o    ### What?? Even after removing method the first  
defined
			### method is still there!!!!
#Browse[1]>
#[1]  TRUE FALSE

I tried this under Windows Xp in 2.8 and 2.9.0.

Vitalie.

> Setting methods for groups ("compare" in this case) does not work
> properly. Once one method is set ,redefining it or even removing does  
> not change the behavior:
Can anyone suggest how to refresh methods "table" for some particular
generic? (in the above case "Compare" group generic).

For now each time I change behavior of a method I have to restart R :(.

Thanks.