-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.
-.SH WARNING
-Note: \fBwimlib\fR and \fB@IMAGEX_PROGNAME@\fR are experimental. Use Microsoft's
-imagex.exe if you have to make sure your WIM files are made "correctly". Feel
-free to submit a bug report if you find a bug.
+By default, the case sensitivity of \fB@IMAGEX_PROGNAME@\fR differs somewhat
+between UNIX-like systems and Windows. WIM images may (but usually do not) have
+multiple files with the same case-insensitive name. Internally, wimlib
+stores filenames as case-sensitive, but on Windows paths
+actually provided by the user for use in a WIM image (e.g. for extracting,
+adding, renaming, or deleting files) will by default be treated as
+case-insensitive in order to get the "expected" behavior. This differs from the
+default behavior on UNIX-like systems, where such paths will be treated as
+case-sensitive. Note that with case insensitivity, a path component may in
+general be ambiguous due to multiple files or directories having the same
+case-insensitive name. In such cases, if there is a file or directory with an
+exactly matching name, it is chosen; otherwise, one of the case-insensitively
+matching file or directories is chosen arbitrarily.
+.PP
+The default behavior can be overridden by explicitly setting the environmental
+variable \fBWIMLIB_IMAGEX_IGNORE_CASE\fR to 1, in which case such paths will be
+treated case insensitively, or 0, in which such paths will be treated case
+sensitively.