John,
Thanks very much. As you suggested, this turned out not to have anything to do
with R-devel. Instead, it seemed traceable
to my decision a while back to start require()'ing packages in my .Rprofile, at
least when I removed .Rprofile then my original
code for image methods worked fine in
Roger,
Are you implying that your current code works differently under R-devel than
with the current release? Nothing I'm aware of would suggest that.
With or without setGeneric() (in either version but the single-argument is
cleaner), a generic function for image() is created in your package'
