diff --git a/src/item/Group.js b/src/item/Group.js
index 9df3b6f7..5feb83b5 100644
--- a/src/item/Group.js
+++ b/src/item/Group.js
@@ -169,7 +169,7 @@ var Group = this.Group = Item.extend(/** @lends Group# */{
 		if (clipItem) {
 			param.clip = true;
 			Item.draw(clipItem, ctx, param);
-			delete param.clip;
+			param.clip = false;
 		}
 		for (var i = 0, l = this._children.length; i < l; i++) {
 			var item = this._children[i];
diff --git a/src/path/CompoundPath.js b/src/path/CompoundPath.js
index 04555f7b..90c4ea9b 100644
--- a/src/path/CompoundPath.js
+++ b/src/path/CompoundPath.js
@@ -197,7 +197,7 @@ var CompoundPath = this.CompoundPath = PathItem.extend(/** @lends CompoundPath#
 		var children = this._children,
 			style = this._style;
 		// Return early if the compound path doesn't have any children:
-		if (children.length == 0)
+		if (children.length === 0)
 			return;
 		ctx.beginPath();
 		param.compound = true;
diff --git a/src/project/Project.js b/src/project/Project.js
index 1444236e..ebe8b4e2 100644
--- a/src/project/Project.js
+++ b/src/project/Project.js
@@ -296,6 +296,8 @@ var Project = this.Project = PaperScopeItem.extend(/** @lends Project# */{
 		matrix.applyToContext(ctx);
 		var param = {
 			offset: new Point(0, 0),
+			// A stack of concatenated matrices, to keep track of the current
+			// global matrix, since Canvas is not able tell us (yet).
 			transforms: [matrix]
 		};
 		for (var i = 0, l = this.layers.length; i < l; i++)