diff -ruN ./Effect.RoundedCorners-0.10.orig/lib/Effect/RoundedCorners.js ./Effect.RoundedCorners-0.10/lib/Effect/RoundedCorners.js
--- ./Effect.RoundedCorners-0.10.orig/lib/Effect/RoundedCorners.js	Sat Feb  4 08:58:15 2006
+++ ./Effect.RoundedCorners-0.10/lib/Effect/RoundedCorners.js	Fri Mar 17 09:21:13 2006
@@ -138,17 +138,25 @@
     for ( var i = 0; i < styles.length; i++ ) {
         var style = styles[i];
 
+        if (typeof style != "undefined") {
         style_string =
             style_string
             + style.shift()
             + " {\n  "
             + style.join(";\n  ")
             + ";\n}\n\n";
+        }
     }
 
     var style_elt = document.createElement("style");
-    var style_text = document.createTextNode(style_string);
-    style_elt.appendChild(style_text);
+    style_elt.setAttribute("type", "text/css");
+
+    if(style_elt.styleSheet) { // IE
+        style_elt.styleSheet.cssText = style_string;
+    } else { // w3c
+        var style_text = document.createTextNode(style_string);
+        style_elt.appendChild(style_text);
+    }
 
     var head = document.getElementsByTagName("head")[0];
     head.appendChild(style_elt);
diff -ruN ./Effect.RoundedCorners-0.10.orig/t/basic.t.html ./Effect.RoundedCorners-0.10/t/basic.t.html
--- ./Effect.RoundedCorners-0.10.orig/t/basic.t.html	Sat Feb  4 08:58:15 2006
+++ ./Effect.RoundedCorners-0.10/t/basic.t.html	Fri Mar 17 09:19:19 2006
@@ -96,8 +96,13 @@
 
 {
     var styles = document.getElementsByTagName("style")[0];
-    like( styles.childNodes[0].nodeValue, /\.rounded-corners-container/,
-          "style tag defines .rounded-corner-containers class" );
+    if(styles.styleSheet) { // IE
+        like( styles.styleSheet.cssText, /\.rounded-corners-container/,
+              "style tag defines .rounded-corner-containers class" );
+    } else {
+        like( styles.childNodes[0].nodeValue, /\.rounded-corners-container/,
+              "style tag defines .rounded-corner-containers class" );
+    }
 }