With that stack trace, it first appeared in 18.0a1/20120929 and is #7 top browser crasher in today's build. The regression range is: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=895f66c4eada&tochange=c09a0c022b2e It's likely a regression from bug 539356 part 9e. Signature mozilla::FrameLayerBuilder::BuildContainerLayerFor(nsDisplayListBuilder*, mozilla::layers::LayerManager*, nsIFrame*, nsDisplayItem*, nsDisplayList const&, mozilla::FrameLayerBuilder::ContainerParameters const&, gfx3DMatrix const*) More Reports Search UUID a3fa620a-b09b-439e-b4c9-795bc2121001 Date Processed 2012-10-01 02:52:17 Uptime 9273 Last Crash 2.6 hours before submission Install Age 11.5 hours since version was first installed. Install Time 2012-09-30 15:19:18 Product Firefox Version 18.0a1 Build ID 20120930030610 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_EXEC Crash Address 0x62656854 App Notes AdapterVendorID: 0x10de, AdapterDeviceID: 0x1201, AdapterSubsysID: 00000000, AdapterDriverVersion: 8.17.13.142 DWrite? DWrite+ D3D10 Layers? D3D10 Layers- D3D9 Layers? D3D9 Layers+ EMCheckCompatibility True Adapter Vendor ID 0x10de Adapter Device ID 0x1201 Total Virtual Memory 4294836224 Available Virtual Memory 3481989120 System Memory Use Percentage 68 Available Page File 3857784832 Available Physical Memory 1348714496 Frame Module Signature Source 0 @0x62656854 1 xul.dll mozilla::FrameLayerBuilder::BuildContainerLayerFor layout/base/FrameLayerBuilder.cpp:2875 2 xul.dll nsDisplayOwnLayer::BuildLayer layout/base/nsDisplayList.cpp:2672 3 xul.dll nsDisplayListBuilder::IsFixedItem layout/base/nsDisplayList.cpp:507 4 @0x12da9abf More reports at: https://crash-stats.mozilla.com/report/list?signature=mozilla%3A%3AFrameLayerBuilder%3A%3ABuildContainerLayerFor%28nsDisplayListBuilder*%2C+mozilla%3A%3Alayers%3A%3ALayerManager*%2C+nsIFrame*%2C+nsDisplayItem*%2C+nsDisplayList+const%26%2C+mozilla%3A%3AFrameLayerBuilder%3A%3AContainerParameters+const%26%2C+gfx3DMatrix+const*%29

Does this still show up in the 10/4 nightly?

(In reply to Chris Jones [:cjones] [:warhammer] from comment #1) > Does this still show up in the 10/4 nightly? It has stopped after 18.0a1/20121002. The working range is: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=85dd8e346102&tochange=635fcc11d2b1

Suspected fixed by bug 795899.