I'm trying to improve my package documentation and tried out promptMethods() in R-2.10.0 (Linux 64-bit Ubuntu). It generates an Rd file with an extra \ before signature, such as: \item{\code{\signature(x = "matrix")}}{ ... } generating warnings upon package check such as the following: prepare_Rd: mwhich-methods.Rd:16: unknown macro '\signature' As expected, deleting this \ creates a perfectly reasonable Rd file. Apologies in advance if this has already been reported and fixed; my google search didn't turn up anything, and I didn't remember seeing anything previously on R-devel. Jay -- John W. Emerson (Jay) Associate Professor of Statistics Department of Statistics Yale University http://www.stat.yale.edu/~jay