I noticed that the --force option is incompatible with --recursive.
For example, if I enter the command "gzip -frv *" in directory c:\dir1 which contains subdirectory dir2, I get:
c:\dir1> gzip -frv * gzip: dir2: Permission denied -- Perry A. Gerakines, Associate Professor Department of Physics, University of Alabama at Birmingham 310 Campbell Hall, 1300 University Blvd. Birmingham, AL USA 35294-1170 tel (205) 934-8064 -- ge...@uab.edu fax (205) 934-8042 -- http://www.phy.uab.edu/~gerakine