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diff --git a/pod/perlrun.pod b/pod/perlrun.pod
index 2a57b6c..d8ed107 100644
--- a/pod/perlrun.pod
+++ b/pod/perlrun.pod
@@ -127,7 +127,7 @@ as the first line in C<*.cmd> file (B<-S> due to a bug in cmd.exe's
 =item MS-DOS
 
 Create a batch file to run your program, and codify it in
-C<ALTERNATIVE_SHEBANG> (see the F<dosish.h> file in the source
+C<ALTERNATE_SHEBANG> (see the F<dosish.h> file in the source
 distribution for more information).
 
 =item Win95/NT
@@ -894,11 +894,13 @@ used.
 
 =item PERL5LIB
 
-A colon-separated list of directories in which to look for Perl library
+A list of directories in which to look for Perl library
 files before looking in the standard library and the current
 directory.  Any architecture-specific directories under the specified
 locations are automatically included if they exist.  If PERL5LIB is not
-defined, PERLLIB is used.
+defined, PERLLIB is used.  Directories are separated (like in PATH) by
+a colon on unixish platforms and by a semicolon on Windows (the proper
+path separator being given by the command C<perl -V:path_sep>).
 
 When running taint checks (either because the program was running setuid
 or setgid, or the B<-T> switch was used), neither variable is used.
@@ -1062,7 +1064,7 @@ and Win32 approximate equivalent:
 
 =item PERLLIB
 
-A colon-separated list of directories in which to look for Perl library
+A list of directories in which to look for Perl library
 files before looking in the standard library and the current directory.
 If PERL5LIB is defined, PERLLIB is not used.
 
@@ -1109,20 +1111,19 @@ PERL_ENCODING environment variable is consulted for an encoding name.
 =item PERL_HASH_SEED
 
 (Since Perl 5.8.1.)  Used to randomise Perl's internal hash function.
+To emulate the pre-5.8.1 behaviour, set to an integer (zero means
+exactly the same order as 5.8.0).  "Pre-5.8.1" means, among other
+things, that hash keys will be ordered the same between different runs
+of Perl.
 
-The default behaviour is B<not> to randomise if the PERL_HASH_SEED is
-unset.  If Perl has been compiled with C<-DUSE_HASH_SEED>, the default
-behaviour B<is> to randomise.  If Perl hash been compiled with
-C<-DNO_HASH_SEED>, the hash randomisation is completely disabled.
-
-If PERL_HASH_SEED is set to a numeric (positive integer) string,
-that is used as the seed.
+The default behaviour is to randomise unless the PERL_HASH_SEED is set.
+If Perl has been compiled with C<-DUSE_HASH_SEED_EXPLICIT>, the default
+behaviour is B<not> to randomise unless the PERL_HASH_SEED is set.
 
 If PERL_HASH_SEED is unset or set to a non-numeric string, Perl uses
 the pseudorandom seed supplied by the operating system and libraries.
-
-The seed being set means that each different run of Perl will have
-a different ordering of the results of keys(), values(), and each().
+This means that each different run of Perl will have a different
+ordering of the results of keys(), values(), and each().
 
 See L<perlsec/"Algorithmic Complexity Attacks"> for more information.