Index: src/OFInflateStream.m
==================================================================
--- src/OFInflateStream.m
+++ src/OFInflateStream.m
@@ -244,10 +244,11 @@
 	case BLOCK_HEADER:
 		if OF_UNLIKELY (_inLastBlock) {
 			[_stream unreadFromBuffer: _buffer + _bufferIndex
 					   length: _bufferLength -
 						   _bufferIndex];
+			_bufferIndex = _bufferLength = 0;
 
 			_atEndOfStream = true;
 			return bytesWritten;
 		}
 
@@ -675,11 +676,16 @@
 }
 #endif
 
 - (void)close
 {
+	/* Give back our buffer to the stream, in case it's shared */
+	[_stream unreadFromBuffer: _buffer + _bufferIndex
+			   length: _bufferLength - _bufferIndex];
+	_bufferIndex = _bufferLength = 0;
+
 	[_stream release];
 	_stream = nil;
 
 	[super close];
 }
 @end

Index: src/OFLHAArchive.m
==================================================================
--- src/OFLHAArchive.m
+++ src/OFLHAArchive.m
@@ -690,10 +690,15 @@
 	    _bufferLength - _bufferIndex == 0 && _state == STATE_BLOCK_HEADER);
 }
 
 - (void)close
 {
+	/* Give back our buffer to the stream, in case it's shared */
+	[_stream unreadFromBuffer: _buffer + _bufferIndex
+			   length: _bufferLength - _bufferIndex];
+	_bufferIndex = _bufferLength = 0;
+
 	[_stream release];
 	_stream = nil;
 
 	[super close];
 }