Index: typo3/sysext/rtehtmlarea/htmlarea/plugins/SelectFont/select-font.js
===================================================================
--- typo3/sysext/rtehtmlarea/htmlarea/plugins/SelectFont/select-font.js	(révision 9329)
+++ typo3/sysext/rtehtmlarea/htmlarea/plugins/SelectFont/select-font.js	(copie de travail)
@@ -223,7 +223,7 @@
 			var value = parentElement.style[this.styleProperty[select.itemId]];
 			if (!value) {
 				if (!Ext.isIE) {
-					if (editor.document.defaultView.getComputedStyle(parentElement, null)) {
+					if (editor.document.defaultView && editor.document.defaultView.getComputedStyle(parentElement, null)) {
 						value = editor.document.defaultView.getComputedStyle(parentElement, null).getPropertyValue(this.cssProperty[select.itemId]);
 					}
 				} else {