These crashes are all happening on Windows 8. Not sure if this change could have caused it - http://src.chromium.org/viewvc/chrome?view=rev&revision=155048

Product: Chrome
Stack Signature: `anonymous namespace'::SetAsDefaultBrowserHandler::ConcludeInteraction(A0x58a46ef1::MakeChromeDe...
New Signature Label: `anonymous namespace'::SetAsDefaultBrowserHandler::ConcludeInteraction(A0x58a46ef1::MakeChromeDefaul...
New Signature Hash: fed92e9b_1dad48f3_8ad7c35b_619e02ec_5a11844b

Report link: http://go/crash/reportdetail?reportid=21ccaea0bb84a43f

Meta information:
Product Name: Chrome
Product Version: 24.0.1297.0
Report ID: 21ccaea0bb84a43f
Report Time: 2012/10/19 09:37:05, Fri
Uptime: 148 sec
Cumulative Uptime: 0 sec
OS Name: Windows NT
OS Version: 6.2.9200 
CPU Architecture: x86
CPU Info: GenuineIntel family 6 model 42 stepping 7
ptype: browser


0:000> k
  *** Stack trace for last set context - .thread/.cxr resets it
ChildEBP RetAddr  
0108f5ac 5331ccee chrome_531f0000!`anonymous namespace'::SetAsDefaultBrowserHandler::ConcludeInteraction+0x19 [c:\b\build\slave\win\build\src\chrome\browser\ui\webui\set_as_default_browser_ui.cc @ 200]
0108f5bc 53220b6d chrome_531f0000!base::internal::Invoker<2,base::internal::BindState<base::internal::RunnableAdapter<void (__thiscall AudioRendererHost::*)(AudioRendererHost::AudioEntry *)>,void __cdecl(AudioRendererHost *,AudioRendererHost::AudioEntry *),void __cdecl(AudioRendererHost *,AudioRendererHost::AudioEntry *)>,void __cdecl(AudioRendererHost *,AudioRendererHost::AudioEntry *)>::Run+0x15 [c:\b\build\slave\win\build\src\base\bind_internal.h @ 1256]
0108f618 532208c1 chrome_531f0000!MessageLoop::RunTask+0x1eb [c:\b\build\slave\win\build\src\base\message_loop.cc @ 472]
0108f768 533e2b7c chrome_531f0000!MessageLoop::DoWork+0x2ec [c:\b\build\slave\win\build\src\base\message_loop.cc @ 662]
0108f798 532204d2 chrome_531f0000!base::MessagePumpForUI::DoRunLoop+0x5b [c:\b\build\slave\win\build\src\base\message_pump_win.cc @ 241]
0108f7b8 5322043d chrome_531f0000!MessageLoop::RunInternal+0x5f [c:\b\build\slave\win\build\src\base\message_loop.cc @ 422]
0108f7cc 536bc64c chrome_531f0000!base::RunLoop::Run+0x59 [c:\b\build\slave\win\build\src\base\run_loop.cc @ 46]
0108f830 536bc585 chrome_531f0000!ChromeBrowserMainParts::MainMessageLoopRun+0xaa [c:\b\build\slave\win\build\src\chrome\browser\chrome_browser_main.cc @ 1505]
0108f844 536bc54f chrome_531f0000!content::BrowserMainLoop::RunMainMessageLoopParts+0x2d [c:\b\build\slave\win\build\src\content\browser\browser_main_loop.cc @ 481]
0108f854 532666a1 chrome_531f0000!`anonymous namespace'::BrowserMainRunnerImpl::Run+0x13 [c:\b\build\slave\win\build\src\content\browser\browser_main_runner.cc @ 123]
0108f868 53208672 chrome_531f0000!BrowserMain+0x3c [c:\b\build\slave\win\build\src\content\browser\browser_main.cc @ 21]
0108f87c 532085f9 chrome_531f0000!content::RunNamedProcessTypeMain+0x58 [c:\b\build\slave\win\build\src\content\app\content_main_runner.cc @ 448]
0108f8e8 531fa621 chrome_531f0000!content::ContentMainRunnerImpl::Run+0x85 [c:\b\build\slave\win\build\src\content\app\content_main_runner.cc @ 741]
0108f8f8 531fa5ad chrome_531f0000!content::ContentMain+0x29 [c:\b\build\slave\win\build\src\content\app\content_main.cc @ 35]
0108f92c 00885228 chrome_531f0000!ChromeMain+0x1e [c:\b\build\slave\win\build\src\chrome\app\chrome_main.cc @ 28]
0108f9a4 00887a9a chrome!MainDllLoader::Launch+0xe9 [c:\b\build\slave\win\build\src\chrome\app\client_util.cc @ 441]
0108f9c8 00887b05 chrome!RunChrome+0x5d [c:\b\build\slave\win\build\src\chrome\app\chrome_exe_main_win.cc @ 77]
0108fa10 008e046d chrome!wWinMain+0x50 [c:\b\build\slave\win\build\src\chrome\app\chrome_exe_main_win.cc @ 92]
0108faa0 751f1866 chrome!__tmainCRTStartup+0x11a [f:\dd\vctools\crt_bld\self_x86\crt\src\crt0.c @ 275]
WARNING: Stack unwind information not available. Following frames may be wrong.
0108faac 771d68f1 kernel32+0x1866
0108faf0 771d689d ntdll+0x368f1
0108fb00 00000000 ntdll+0x3689d