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diff --git a/pod/perlapi.pod b/pod/perlapi.pod
index cf7c5db..f5596e2 100644
--- a/pod/perlapi.pod
+++ b/pod/perlapi.pod
@@ -1045,7 +1045,8 @@ Found in file scope.h
 =item looks_like_number
 
 Test if an the content of an SV looks like a number (or is a
-number).
+number). C<Inf> and C<Infinity> are treated as numbers (so will not
+issue a non-numeric warning), even if your atof() doesn't grok them.
 
 	I32	looks_like_number(SV* sv)
 
@@ -1283,7 +1284,7 @@ The idea here is that as string table is used for shared hash
 keys these strings will have SvPVX == HeKEY and hash lookup
 will avoid string compare.
 
-	SV*	newSVpvn_share(const char* s, STRLEN len, U32 hash)
+	SV*	newSVpvn_share(const char* s, I32 len, U32 hash)
 
 =for hackers
 Found in file sv.c
@@ -1443,7 +1444,7 @@ Found in file perl.c
 =item PL_DBsingle
 
 When Perl is run in debugging mode, with the B<-d> switch, this SV is a
-boolean which indicates whether subs are being single-stepped. 
+boolean which indicates whether subs are being single-stepped.
 Single-stepping is automatically turned on after every step.  This is the C
 variable which corresponds to Perl's $DB::single variable.  See
 C<PL_DBsub>.
@@ -1487,10 +1488,10 @@ Found in file intrpvar.h
 
 =item PL_modglobal
 
-C<PL_modglobal> is a general purpose, interpreter global HV for use by 
+C<PL_modglobal> is a general purpose, interpreter global HV for use by
 extensions that need to keep information on a per-interpreter basis.
-In a pinch, it can also be used as a symbol table for extensions 
-to share data among each other.  It is a good idea to use keys 
+In a pinch, it can also be used as a symbol table for extensions
+to share data among each other.  It is a good idea to use keys
 prefixed by the package name of the extension that owns the data.
 
 	HV*	PL_modglobal
@@ -2434,6 +2435,15 @@ Type flag for blessed scalars.  See C<svtype>.
 =for hackers
 Found in file sv.h
 
+=item SvUOK
+
+Returns a boolean indicating whether the SV contains an unsigned integer.
+
+	void	SvUOK(SV* sv)
+
+=for hackers
+Found in file sv.h
+
 =item SvUPGRADE
 
 Used to upgrade an SV to a more complex form.  Uses C<sv_upgrade> to
@@ -2572,8 +2582,9 @@ Found in file sv.c
 
 =item sv_catsv
 
-Concatenates the string from SV C<ssv> onto the end of the string in SV
-C<dsv>.  Handles 'get' magic, but not 'set' magic.  See C<sv_catsv_mg>.
+Concatenates the string from SV C<ssv> onto the end of the string in
+SV C<dsv>.  Modifies C<dsv> but not C<ssv>.  Handles 'get' magic, but
+not 'set' magic.  See C<sv_catsv_mg>.
 
 	void	sv_catsv(SV* dsv, SV* ssv)
 
@@ -3064,7 +3075,7 @@ Found in file sv.c
 Unsets the RV status of the SV, and decrements the reference count of
 whatever was being referenced by the RV.  This can almost be thought of
 as a reversal of C<newSVrv>.  This is C<sv_unref_flags> with the C<flag>
-being zero.  See C<SvROK_off>.  
+being zero.  See C<SvROK_off>.
 
 	void	sv_unref(SV* sv)
 
@@ -3079,7 +3090,7 @@ as a reversal of C<newSVrv>.  The C<cflags> argument can contain
 C<SV_IMMEDIATE_UNREF> to force the reference count to be decremented
 (otherwise the decrementing is conditional on the reference count being
 different from one or the reference being a readonly SV).
-See C<SvROK_off>.  
+See C<SvROK_off>.
 
 	void	sv_unref_flags(SV* sv, U32 flags)
 
@@ -3273,8 +3284,7 @@ Found in file utf8.c
 
 Returns the character value of the first character in the string C<s>
 which is assumed to be in UTF8 encoding and no longer than C<curlen>;
-C<retlen> will be set to the length, in bytes, of that character,
-and the pointer C<s> will be advanced to the end of the character.
+C<retlen> will be set to the length, in bytes, of that character.
 
 If C<s> does not point to a well-formed UTF8 character, the behaviour
 is dependent on the value of C<flags>: if it contains UTF8_CHECK_ONLY,
@@ -3296,8 +3306,7 @@ Found in file utf8.c
 
 Returns the character value of the first character in the string C<s>
 which is assumed to be in UTF8 encoding; C<retlen> will be set to the
-length, in bytes, of that character, and the pointer C<s> will be
-advanced to the end of the character.
+length, in bytes, of that character.
 
 If C<s> does not point to a well-formed UTF8 character, zero is
 returned and retlen is set, if possible, to -1.