diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index d6fc6fa61..0251812d0 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -12,12 +12,14 @@
 
 **Enhancements**
 - **Build Tools** - Added new `autoInstall` option to allow for Semantic to be installed without user interaction. See [docs explanation](http://www.semantic-ui.com/introduction/advanced-usage.html#Auto-Install) for how to use. #3616 **Thanks @algorithme**
+-**Site** `@px` and `@relativepx` i.e. `@relative12px` which can be used to return EM value of pixels are now extended to `@relative40px`
 -**Table** - Added more granular variablaes for controlling style on first column in a `definition table`
 
 **Docs**
 -**Form** - Added example of using custom rules with form
 -**Build Tools** - Added explanation of using SUI with CI, and auto-install in "recipes" section.
 -**Build Tools** - Added explanation of how to build RTL in "recipes" section
+-**Layouts**  - Added "attached" example showing content attached to other content
 
 ### Version 2.1.8 - Jan 7, 2016
 
diff --git a/src/definitions/modules/popup.js b/src/definitions/modules/popup.js
index 25065138c..c2737f77c 100644
--- a/src/definitions/modules/popup.js
+++ b/src/definitions/modules/popup.js
@@ -697,7 +697,7 @@ $.fn.popup = function(parameters) {
             popup  = calculations.popup;
             parent = calculations.parent;
 
-            if(target.width === 0 && target.height === 0 && !(target.element instanceof SVGGraphicsElement)) {
+            if(target.width === 0 && target.height === 0 && SVGGraphicsElement && !(target.element instanceof SVGGraphicsElement)) {
               module.debug('Popup target is hidden, no action taken');
               return false;
             }
diff --git a/src/themes/default/globals/site.variables b/src/themes/default/globals/site.variables
index ca38cf114..69d1bea5c 100644
--- a/src/themes/default/globals/site.variables
+++ b/src/themes/default/globals/site.variables
@@ -400,6 +400,32 @@
 @12px         : unit( (12 / @emSize), rem);
 @13px         : unit( (13 / @emSize), rem);
 @14px         : unit( (14 / @emSize), rem);
+@15px         : unit( (15 / @emSize), rem);
+@16px         : unit( (16 / @emSize), rem);
+@17px         : unit( (17 / @emSize), rem);
+@18px         : unit( (18 / @emSize), rem);
+@19px         : unit( (19 / @emSize), rem);
+@20px         : unit( (20 / @emSize), rem);
+@21px         : unit( (21 / @emSize), rem);
+@22px         : unit( (22 / @emSize), rem);
+@23px         : unit( (23 / @emSize), rem);
+@24px         : unit( (24 / @emSize), rem);
+@25px         : unit( (25 / @emSize), rem);
+@26px         : unit( (26 / @emSize), rem);
+@27px         : unit( (27 / @emSize), rem);
+@28px         : unit( (28 / @emSize), rem);
+@29px         : unit( (29 / @emSize), rem);
+@30px         : unit( (30 / @emSize), rem);
+@31px         : unit( (31 / @emSize), rem);
+@32px         : unit( (32 / @emSize), rem);
+@33px         : unit( (33 / @emSize), rem);
+@34px         : unit( (34 / @emSize), rem);
+@35px         : unit( (35 / @emSize), rem);
+@36px         : unit( (36 / @emSize), rem);
+@37px         : unit( (37 / @emSize), rem);
+@38px         : unit( (38 / @emSize), rem);
+@39px         : unit( (39 / @emSize), rem);
+@40px         : unit( (40 / @emSize), rem);
 
 @relative1px  : unit( (1 / @emSize), em);
 @relative2px  : unit( (2 / @emSize), em);
@@ -415,6 +441,32 @@
 @relative12px : unit( (12 / @emSize), em);
 @relative13px : unit( (13 / @emSize), em);
 @relative14px : unit( (14 / @emSize), em);
+@relative15px : unit( (15 / @emSize), em);
+@relative16px : unit( (16 / @emSize), em);
+@relative17px : unit( (17 / @emSize), em);
+@relative18px : unit( (18 / @emSize), em);
+@relative19px : unit( (19 / @emSize), em);
+@relative20px : unit( (20 / @emSize), em);
+@relative21px : unit( (21 / @emSize), em);
+@relative22px : unit( (22 / @emSize), em);
+@relative23px : unit( (23 / @emSize), em);
+@relative24px : unit( (24 / @emSize), em);
+@relative25px : unit( (25 / @emSize), em);
+@relative26px : unit( (26 / @emSize), em);
+@relative27px : unit( (27 / @emSize), em);
+@relative28px : unit( (28 / @emSize), em);
+@relative29px : unit( (29 / @emSize), em);
+@relative30px : unit( (30 / @emSize), em);
+@relative31px : unit( (31 / @emSize), em);
+@relative32px : unit( (32 / @emSize), em);
+@relative33px : unit( (33 / @emSize), em);
+@relative34px : unit( (34 / @emSize), em);
+@relative35px : unit( (35 / @emSize), em);
+@relative36px : unit( (36 / @emSize), em);
+@relative37px : unit( (37 / @emSize), em);
+@relative38px : unit( (38 / @emSize), em);
+@relative39px : unit( (39 / @emSize), em);
+@relative40px : unit( (40 / @emSize), em);
 
 /*-------------------
        Icons