Index: src/OFApplication.h
==================================================================
--- src/OFApplication.h
+++ src/OFApplication.h
@@ -119,13 +119,13 @@
 	void (*SIGUSR2Handler)(id, SEL);
 #endif
 }
 
 #ifdef OF_HAVE_PROPERTIES
-@property (readonly, assign) OFString *programName;
-@property (readonly, assign) OFArray *arguments;
-@property (readonly, assign) OFDictionary *environment;
+@property (readonly, copy, nonatomic) OFString *programName;
+@property (readonly, copy, nonatomic) OFArray *arguments;
+@property (readonly, copy, nonatomic) OFDictionary *environment;
 @property (assign) id <OFApplicationDelegate> delegate;
 #endif
 
 /**
  * \brief Returns the only OFApplication instance in the application.

Index: src/OFApplication.m
==================================================================
--- src/OFApplication.m
+++ src/OFApplication.m
@@ -252,21 +252,21 @@
 	*argv_ = argv;
 }
 
 - (OFString*)programName
 {
-	return programName;
+	OF_GETTER(programName, NO)
 }
 
 - (OFArray*)arguments
 {
-	return arguments;
+	OF_GETTER(arguments, NO)
 }
 
 - (OFDictionary*)environment
 {
-	return environment;
+	OF_GETTER(environment, NO)
 }
 
 - (id <OFApplicationDelegate>)delegate
 {
 	return delegate;

Index: src/OFHTTPRequest.m
==================================================================
--- src/OFHTTPRequest.m
+++ src/OFHTTPRequest.m
@@ -560,16 +560,16 @@
 	return statusCode;
 }
 
 - (OFDictionary*)headers
 {
-	return [[headers copy] autorelease];
+	OF_GETTER(headers, YES)
 }
 
 - (OFDataArray*)data
 {
-	return [[data retain] autorelease];
+	OF_GETTER(data, YES)
 }
 @end
 
 @implementation OFObject (OFHTTPRequestDelegate)
 -   (void)request: (OFHTTPRequest*)request

Index: src/OFNumber.h
==================================================================
--- src/OFNumber.h
+++ src/OFNumber.h
@@ -94,10 +94,14 @@
 		float	       float_;
 		double	       double_;
 	} value;
 	of_number_type_t type;
 }
+
+#ifdef OF_HAVE_PROPERTIES
+@property (readonly) of_number_type_t type;
+#endif
 
 /**
  * \brief Creates a new OFNumber with the specified BOOL.
  *
  * \param bool_ A BOOL which the OFNumber should contain

Index: src/OFTimer.h
==================================================================
--- src/OFTimer.h
+++ src/OFTimer.h
@@ -39,10 +39,14 @@
 	of_timer_block_t block;
 #endif
 	BOOL isValid, done;
 	OFCondition *condition;
 }
+
+#ifdef OF_HAVE_PROPERTIES
+@property (readonly, retain) OFDate *fireDate;
+#endif
 
 /**
  * \brief Creates and schedules a new timer with the specified time interval.
  *
  * \param interval The time interval after which the timer should be executed

Index: src/OFTimer.m
==================================================================
--- src/OFTimer.m
+++ src/OFTimer.m
@@ -387,11 +387,11 @@
 		isValid = NO;
 }
 
 - (OFDate*)fireDate
 {
-	return [[fireDate retain] autorelease];
+	OF_GETTER(fireDate, YES)
 }
 
 - (double)timeInterval
 {
 	return interval;