diff --git a/core/modules/editor/engines/framed.js b/core/modules/editor/engines/framed.js
index 347de034d..e5aaa4a1e 100644
--- a/core/modules/editor/engines/framed.js
+++ b/core/modules/editor/engines/framed.js
@@ -40,6 +40,7 @@ function FramedEngine(options) {
 	// Style the iframe
 	this.iframeNode.className = this.dummyTextArea.className;
 	this.iframeNode.style["border-radius"] = "2px";
+	this.iframeNode.style.border = "none";
 	this.iframeNode.style.padding = "0";
 	this.iframeNode.style.resize = "none";
 	this.iframeNode.style["background-color"] = this.widget.wiki.extractTiddlerDataItem(this.widget.wiki.getTiddlerText("$:/palette"),"background");
diff --git a/themes/tiddlywiki/vanilla/base.tid b/themes/tiddlywiki/vanilla/base.tid
index c71db56b3..50c0214c9 100644
--- a/themes/tiddlywiki/vanilla/base.tid
+++ b/themes/tiddlywiki/vanilla/base.tid
@@ -1274,19 +1274,14 @@ html body.tc-body.tc-single-tiddler-window {
 
 .tc-tiddler-preview {
 	overflow: auto;
-	margin-left: -0.3em;
-	margin-right: -0.3em;
-	padding-left: 0.3em;
-	padding-right: 0.3em;
 }
 
 .tc-tiddler-preview-preview {
 	float: right;
 	width: 49%;
 	border: 1px solid <<colour tiddler-editor-border>>;
-	border-radius: 2px;
 	margin: 4px 0 3px 3px;
-	padding: 3px 3px 3px 0.5em;
+	padding: 3px 3px 3px 3px;
 }
 
 <<if-editor-height-fixed then:"""