I'm seeing a bunch of leaks when running even simple layout tests (i.e. run-webkit-tests --debug --leaks fast/js/typeof-syntax.html).

This ring any bells for anyone?:

start
main
dumpRenderTree(int, char const**)
runTestingServerLoop()
runTest(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
-[NSRunLoop(NSRunLoop) runMode:beforeDate:]
CFRunLoopRunInMode
CFRunLoopRunSpecific
MultiplexerSource::perform()
URLConnectionClient::processEvents()
URLConnectionClient::ClientConnectionEventQueue::processAllEventsAndConsumePayload(XConnectionEventInfo<XClientEvent, XClientEventParams>*, long)
URLConnectionClient::_clientDidFinishLoading(URLConnectionClient::ClientConnectionEventQueue*)
_NSURLConnectionDidFinishLoading
-[NSURLConnection(NSURLConnectionReallyInternal) sendDidFinishLoading]
-[WebCoreResourceHandleAsDelegate connectionDidFinishLoading:]
WebCore::ResourceLoader::didFinishLoading(WebCore::ResourceHandle*)
WebCore::SubresourceLoader::didFinishLoading()
WebCore::Loader::Host::didFinishLoading(WebCore::SubresourceLoader*)
WebCore::CachedCSSStyleSheet::data(WTF::PassRefPtr<WebCore::SharedBuffer>, bool)
WebCore::CachedCSSStyleSheet::checkNotify()
WebCore::HTMLLinkElement::setCSSStyleSheet(WebCore::String const&, WebCore::String const&, WebCore::CachedCSSStyleSheet const*)
WebCore::CSSStyleSheet::checkLoaded()
WebCore::HTMLLinkElement::sheetLoaded()
WebCore::Document::removePendingSheet()
WebCore::HTMLTokenizer::executeScriptsWaitingForStylesheets()
WebCore::HTMLTokenizer::notifyFinished(WebCore::CachedResource*)
WebCore::HTMLTokenizer::scriptExecution(WebCore::ScriptSourceCode const&, WebCore::HTMLTokenizer::State)
WebCore::FrameLoader::executeScript(WebCore::ScriptSourceCode const&)
WebCore::ScriptController::evaluate(WebCore::ScriptSourceCode const&)
JSC::evaluate(JSC::ExecState*, JSC::ScopeChain&, JSC::SourceCode const&, JSC::JSValue)
WTF::PassRefPtr<JSC::ProgramNode> JSC::Parser::parse<JSC::ProgramNode>(JSC::ExecState*, JSC::Debugger*, JSC::SourceCode const&, int*, JSC::UString*)
JSC::Parser::parse(JSC::JSGlobalData*, int*, JSC::UString*)
jscyyparse(void*)
JSC::ParserArenaDeletable::operator new(unsigned long)
WTF::fastMalloc(unsigned long)
malloc
malloc_zone_malloc