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[krille]

Hi everyone,
I am building an iPhone app that parses a couple of xml files using TouchXML. I have a class XMLParser, which takes care of downloading and parsing the results. I am getting memory leaks when I parse an xml file more than once with the same instance of XMLParser.
Here is one of the parsing methods:

for(int counter = 0; counter < [item childCount]; counter++) {
	CXMLNode *child = [item childAtIndex:counter];
	if([[child name] isEqualToString:@"PRODUCT"]) 
	{
		NSMutableDictionary *product = [[NSMutableDictionary alloc] 
						init];
		for(int j = 0; j < [child childCount]; j++) {
			CXMLNode *grandchild = [child childAtIndex:j];
			if([[grandchild stringValue] length] > 1) {
				NSString *trimmedString = [[grandchild stringValue] 
				stringByTrimmingCharactersInSet:
				[NSCharacterSet whitespaceAndNewlineCharacterSet]];
				[product setObject:trimmedString 
				forKey:[grandchild name]];
			}
		}
		
		// Add product to current category array
		switch (categoryId) {
			case 0:
				[self.mobil addObject:product];
				break;
			case 1:
				[self.allgemein addObject:product];
				break;
			case 2:
				[self.besitzeIch addObject:product];
				break;
			case 3:
				[self.willIch addObject:product];
				break;
			default:
				break;
		}
		//DebugLog(@"ADD allgemein %@",product);
		[product release];
	}
}

The first time, I parse the xml no leak shows up in instruments, the next time I do so, I got a lot of leaks (NSCFString / NSCFDictionary).
Instruments points me to this line in CXMLNode.m, when I dig into a leaked object:

theStringValue = [NSString stringWithUTF8String:(const char *)theXMLString];
if ( _node->type != CXMLTextKind )
	xmlFree(theXMLString);
}

return(theStringValue);

I really spent a long time and tried multiple approaches to fix this, but to no avail so far, maybe I am missing something essential?

Any help is highly appreciated, thank you!