+.SH CASE SENSITIVITY
+The case sensitivity of \fB@IMAGEX_PROGNAME@\fR differs somewhat between UNIX
+and Windows. \fB@IMAGEX_PROGNAME@\fR internally treats filenames as
+case-sensitive, but on Windows it will treat paths actually provided by the user
+as case-insensitive in order to get the "expected" behavior. Otherwise, options
+and non-path arguments should be specified in lower case.