It has been hit by two users in 21.0a1/20130215. Signature ia2AccessibleHypertext::get_hyperlink(long, IAccessibleHyperlink**) More Reports Search UUID 97b7d36d-5deb-427b-8d7c-c5d282130215 Date Processed 2013-02-15 21:37:28 Uptime 57 Last Crash 1.2 minutes before submission Install Age 1.5 hours since version was first installed. Install Time 2013-02-15 20:05:58 Product Firefox Version 21.0a1 Build ID 20130215031040 Release Channel nightly OS Windows NT OS Version 6.1.7601 Service Pack 1 Build Architecture x86 Build Architecture Info GenuineIntel family 6 model 42 stepping 7 Crash Reason EXCEPTION_ACCESS_VIOLATION_READ Crash Address 0x0 App Notes AdapterVendorID: 0x8086, AdapterDeviceID: 0x0126, AdapterSubsysID: 00051179, AdapterDriverVersion: 8.15.10.2430 D2D? D2D+ DWrite? DWrite+ D3D10 Layers? D3D10 Layers+ D3D10 Layers- D3D9 Layers? D3D9 Layers- Processor Notes sp-processor03.phx1.mozilla.com_15319:2008 EMCheckCompatibility True Adapter Vendor ID 0x8086 Adapter Device ID 0x0126 Total Virtual Memory 4294836224 Available Virtual Memory 2956201984 System Memory Use Percentage 48 Available Page File 12171751424 Available Physical Memory 4370165760 Accessibility Active Frame Module Signature Source 0 xul.dll ia2AccessibleHypertext::get_hyperlink accessible/src/windows/ia2/ia2AccessibleHypertext.cpp:53 1 VBufBackend_gecko_ia2.dll VBufBackend_gecko_ia2.dll@0x186b8 More reports at: https://crash-stats.mozilla.com/report/list?signature=ia2AccessibleHypertext%3A%3Aget_hyperlink%28long%2C+IAccessibleHyperlink**%29

totally trivial regression from the nsIWinAccessNode stuff so I just pushed https://hg.mozilla.org/integration/mozilla-inbound/rev/eba1ef07a9ad