Index: src/XMPPExceptions.h
==================================================================
--- src/XMPPExceptions.h
+++ src/XMPPExceptions.h
@@ -33,11 +33,11 @@
 	XMPPConnection *_connection;
 }
 
 #ifdef OF_HAVE_PROPERTIES
 /// \brief The connection the exception relates to
-@property (readonly, assign) XMPPConnection *connection;
+@property (readonly, retain) XMPPConnection *connection;
 #endif
 
 /**
  * \brief Creates a new XMPPException.
  *
@@ -67,13 +67,13 @@
 	OFString *_condition, *_reason;
 }
 
 #ifdef OF_HAVE_PROPERTIES
 /// \brief The defined error condition specified by the stream error
-@property (readonly, assign) OFString *condition;
+@property (readonly, copy) OFString *condition;
 /// \brief The descriptive free-form text specified by the stream error
-@property (readonly, assign) OFString *reason;
+@property (readonly, copy) OFString *reason;
 #endif
 
 /**
  * \brief Creates a new XMPPStreamErrorException.
  *
@@ -111,13 +111,13 @@
 	OFString *_profile, *_string;
 }
 
 #ifdef OF_HAVE_PROPERTIES
 /// \brief The name of the stringprep profile that did not apply
-@property (readonly, assign) OFString *profile;
+@property (readonly, copy) OFString *profile;
 /// \brief The string that failed the stringprep profile
-@property (readonly, assign) OFString *string;
+@property (readonly, copy) OFString *string;
 #endif
 
 /**
  * \brief Creates a new XMPPStringPrepFailedException.
  *
@@ -154,13 +154,13 @@
 	OFString *_operation, *_string;
 }
 
 #ifdef OF_HAVE_PROPERTIES
 /// \brief The IDNA translation operation which failed
-@property (readonly, assign) OFString *operation;
+@property (readonly, copy) OFString *operation;
 /// \brief The string that could not be translated
-@property (readonly, assign) OFString *string;
+@property (readonly, copy) OFString *string;
 #endif
 
 /**
  * \brief Creates a new XMPPIDNATranslationFailedException.
  *
@@ -197,11 +197,11 @@
 	OFString *_reason;
 }
 
 #ifdef OF_HAVE_PROPERTIES
 /// \brief The reason the authentication failed
-@property (readonly, assign) OFString *reason;
+@property (readonly, copy) OFString *reason;
 #endif
 
 /**
  * \brief Creates a new XMPPAuthFailedException.
  *

Index: src/XMPPExceptions.m
==================================================================
--- src/XMPPExceptions.m
+++ src/XMPPExceptions.m
@@ -68,11 +68,11 @@
 	[super dealloc];
 }
 
 - (XMPPConnection*)connection
 {
-	OF_GETTER(_connection, false)
+	OF_GETTER(_connection, true)
 }
 @end
 
 @implementation XMPPStreamErrorException
 + (instancetype)exceptionWithConnection: (XMPPConnection*)connection
@@ -127,16 +127,16 @@
 	    @"Got stream error: %@. Reason: %@!", _condition, _reason];
 }
 
 - (OFString*)condition
 {
-	OF_GETTER(_condition, false)
+	OF_GETTER(_condition, true)
 }
 
 - (OFString*)reason
 {
-	OF_GETTER(_reason, false)
+	OF_GETTER(_reason, true)
 }
 @end
 
 @implementation XMPPStringPrepFailedException
 + (instancetype)exceptionWithConnection: (XMPPConnection*)connection
@@ -192,16 +192,16 @@
 	    _profile, _string];
 }
 
 - (OFString*)profile
 {
-	OF_GETTER(_profile, false)
+	OF_GETTER(_profile, true)
 }
 
 - (OFString*)string
 {
-	OF_GETTER(_string, false)
+	OF_GETTER(_string, true)
 }
 @end
 
 @implementation XMPPIDNATranslationFailedException
 + (instancetype)exceptionWithConnection: (XMPPConnection*)connection
@@ -256,16 +256,16 @@
 	    @"IDNA operation %@ failed on string '%@'!", _operation, _string];
 }
 
 - (OFString*)operation
 {
-	OF_GETTER(_operation, false)
+	OF_GETTER(_operation, true)
 }
 
 - (OFString*)string
 {
-	OF_GETTER(_string, false)
+	OF_GETTER(_string, true)
 }
 @end
 
 @implementation XMPPAuthFailedException
 + (instancetype)exceptionWithConnection: (XMPPConnection*)connection
@@ -315,8 +315,8 @@
 	    @"Authentication failed. Reason: %@!", _reason];
 }
 
 - (OFString*)reason
 {
-	OF_GETTER(_reason, false)
+	OF_GETTER(_reason, true)
 }
 @end