Index: typo3/sysext/rtehtmlarea/htmlarea/htmlarea.js
===================================================================
--- typo3/sysext/rtehtmlarea/htmlarea/htmlarea.js	(révision 8885)
+++ typo3/sysext/rtehtmlarea/htmlarea/htmlarea.js	(copie de travail)
@@ -1097,11 +1097,23 @@
 			errorText = "Stylesheets not yet loaded";
 		}
 	} else {
-		for (var rule = 0; rule < doc.styleSheets.length; rule++) {
-			if (HTMLArea.is_gecko) try { rules = doc.styleSheets[rule].cssRules; } catch(e) { stylesAreLoaded = false; errorText = e; }
-			if (HTMLArea.is_ie) try { rules = doc.styleSheets[rule].rules; } catch(e) { stylesAreLoaded = false; errorText = e; }
-			if (HTMLArea.is_ie) try { rules = doc.styleSheets[rule].imports; } catch(e) { stylesAreLoaded = false; errorText = e; }
+			// Test if the styleSheets array is at all accessible
+		if (HTMLArea.is_ie) {
+			try { rules = doc.styleSheets[0].rules; } catch(e) { stylesAreLoaded = false; errorText = e; }
+		} else {
+			try { doc.styleSheets[0] && doc.styleSheets[0].cssRules; } catch(e) { stylesAreLoaded = false; errorText = e; }
 		}
+			// Then test if all stylesheets are accessible
+		if (stylesAreLoaded) {
+			for (var rule = 0; rule < doc.styleSheets.length; rule++) {
+				if (HTMLArea.is_ie) {
+					try { rules = doc.styleSheet.rules; } catch(e) { stylesAreLoaded = false; errorText = e; }
+					try { rules = doc.styleSheet.imports; } catch(e) { stylesAreLoaded = false; errorText = e; }
+				} else {
+					try { rules = doc.styleSheet.cssRules; } catch(e) { stylesAreLoaded = false; errorText = e; }
+				}
+			}
+		}
 	}
 	if (!stylesAreLoaded && !HTMLArea.is_wamcom) {
 		HTMLArea._appendToLog("[HTMLArea::initIframe]: Failed attempt at loading stylesheets: " + errorText + " Retrying...");