Index: src/OFString+Serialization.m
==================================================================
--- src/OFString+Serialization.m
+++ src/OFString+Serialization.m
@@ -22,20 +22,34 @@
 #import "OFArray.h"
 #import "OFXMLElement.h"
 #import "OFAutoreleasePool.h"
 
 #import "OFInvalidArgumentException.h"
+#import "OFMalformedXMLException.h"
+#import "OFUnboundNamespaceException.h"
 
 int _OFString_Serialization_reference;
 
 @implementation OFString (Serialization)
 - (id)objectByDeserializing
 {
 	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
-	OFXMLElement *root = [OFXMLElement elementWithXMLString: self];
+	OFXMLElement *root;
 	OFArray *elements;
 	id object;
+
+	@try {
+		root = [OFXMLElement elementWithXMLString: self];
+	} @catch (OFMalformedXMLException *e) {
+		[e release];
+		@throw [OFInvalidArgumentException newWithClass: isa
+						       selector: _cmd];
+	} @catch (OFUnboundNamespaceException *e) {
+		[e release];
+		@throw [OFInvalidArgumentException newWithClass: isa
+						       selector: _cmd];
+	}
 
 	elements = [root elementsForNamespace: OF_SERIALIZATION_NS];
 
 	if ([elements count] != 1)
 		@throw [OFInvalidArgumentException newWithClass: isa

Index: src/exceptions/OFInvalidArgumentException.m
==================================================================
--- src/exceptions/OFInvalidArgumentException.m
+++ src/exceptions/OFInvalidArgumentException.m
@@ -53,11 +53,11 @@
 {
 	if (description != nil)
 		return description;
 
 	description = [[OFString alloc] initWithFormat:
-	    @"The argument for method %s of class %@ is invalid!",
+	    @"The argument or receiver for method %s of class %@ is invalid!",
 	    sel_getName(selector), inClass];
 
 	return description;
 }