diff --git a/less/00-config.less b/less/00-config.less
index b02deb4..32ad13b 100644
--- a/less/00-config.less
+++ b/less/00-config.less
@@ -49,7 +49,7 @@
 @ultra-large-screen		: 1600px; // ultra large screens media query
 
 // misc
-@gutter		: 20px; // gutter value (%, px, em, rem) for grid layouts
+@gutter		: 20px; // gutter value for grid layouts. Unit can be: %, px, em, rem
 
 // LESS mixins : don't touch or you'll be banned ;)
 // px to em/rem 
diff --git a/less/01-base.less b/less/01-base.less
index 48a4f87..a4938e4 100644
--- a/less/01-base.less
+++ b/less/01-base.less
@@ -1,6 +1,6 @@
 @import "00-config";
 /*!
-* www.KNACSS.com V3.0.3 (2014-05-019) @author: Raphael Goetter, Alsacreations
+* www.KNACSS.com V3.0.3 (2014-05-19) @author: Raphael Goetter, Alsacreations
 * Licence WTFPL http://www.wtfpl.net/
 */
 
@@ -185,7 +185,7 @@ sup {
 /* == hiding content             */
 /* ----------------------------- */
 
-/* hidden but not for assistance tools, Yahoo! method */
+/* hidden but not for an assistive technology like a screen reader, Yahoo! method */
 .visually-hidden { 
 	position: absolute !important;
     border: 0 !important;
diff --git a/less/06-rwd.less b/less/06-rwd.less
index 3195861..9da7e93 100644
--- a/less/06-rwd.less
+++ b/less/06-rwd.less
@@ -4,11 +4,11 @@
 /* ----------------------------- */
 
 @media (min-width: @small-screen) {
-/* rules for big resources and big screens like: background-images, font-faces, etc. */
+	/* rules for big resources and big screens like: background-images, font-faces, etc. */
 }
 
 @media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi), (min-resolution: 2dppx) {
-/* style adjustments for high density devices */
+	/* style adjustments for high density devices */
 }
 
 /* ---------------------------------- */
diff --git a/less/11-ie.less b/less/11-ie.less
index 1e68be4..0774f94 100644
--- a/less/11-ie.less
+++ b/less/11-ie.less
@@ -70,6 +70,7 @@
 		*zoom: 1;
 	}
 	
+	/* old syntax of clip for IE6/IE7 */
 	.visually-hidden { 
 		*clip: rect(1px 1px 1px 1px); 
 	}