Seen while looking at Mac crash stats. Low volume 10.7 only crash. Crashes started showing up using the 2011081300 build. Lone comment: "Aurora continually crashes; I need to force quit and reboot at least a dozen times during the average session; I was at tumblr.com when this last crash occurred." https://crash-stats.mozilla.com/report/index/6be241c2-7dbf-4842-a194-862282110816 Frame Module Signature [Expand] Source 0 XUL __-[ChildView maybeTrackScrollEventAsSwipe:scrollOverflow:]_block_invoke_1 widget/src/cocoa/nsChildView.mm:3102 1 AppKit AppKit@0x3f70e3 2 libdispatch.dylib libdispatch.dylib@0x1909 3 libdispatch.dylib libdispatch.dylib@0x3c56 4 libdispatch.dylib libdispatch.dylib@0x62f0 5 libdispatch.dylib libdispatch.dylib@0x2fc6 6 libdispatch.dylib libdispatch.dylib@0x3746 7 CoreFoundation CoreFoundation@0x38c0b 8 CoreFoundation CoreFoundation@0x175f15 9 HIToolbox HIToolbox@0x88eb 10 libsystem_c.dylib libsystem_c.dylib@0x4d15f 11 CoreFoundation CoreFoundation@0x4003f 12 CoreFoundation CoreFoundation@0x84ba 13 CoreFoundation CoreFoundation@0x8903 14 CoreFoundation CoreFoundation@0x8903 15 CoreFoundation CoreFoundation@0x2754 16 libobjc.A.dylib libobjc.A.dylib@0xea22 17 CoreFoundation CoreFoundation@0xee1f 18 HIToolbox HIToolbox@0x2d797 19 HIToolbox HIToolbox@0x2d7d3 20 libsystem_c.dylib libsystem_c.dylib@0x675c2 21 libsystem_c.dylib libsystem_c.dylib@0x675c2 22 CoreGraphics CoreGraphics@0x82e98 23 HIToolbox HIToolbox@0x164d9 24 HIToolbox HIToolbox@0x16403 25 libobjc.A.dylib libobjc.A.dylib@0xf049 26 libobjc.A.dylib libobjc.A.dylib@0xf049 27 libsystem_c.dylib libsystem_c.dylib@0x675c2 28 HIToolbox HIToolbox@0x7c28 29 HIToolbox HIToolbox@0x8d4d 30 AppKit AppKit@0x717e7 31 AppKit AppKit@0x41b10 32 AppKit AppKit@0x717af 33 CoreGraphics CoreGraphics@0x61dcee 34 AppKit AppKit@0x71727 35 AppKit AppKit@0x66559 36 AppKit AppKit@0x71632 37 AppKit AppKit@0x72474 38 AppKit AppKit@0x72308 39 AppKit AppKit@0x72239 40 AppKit AppKit@0x721a1 41 AppKit AppKit@0x876b27 42 HIToolbox HIToolbox@0x2627e1 43 AppKit AppKit@0x385c 44 AppKit AppKit@0x72474 45 AppKit AppKit@0x385c 46 libsystem_c.dylib libsystem_c.dylib@0x4d46f 47 CoreFoundation CoreFoundation@0x1ec7c 48 CarbonCore CarbonCore@0x17efb 49 CoreFoundation CoreFoundation@0x38540 50 CoreFoundation CoreFoundation@0xf342 51 CoreFoundation CoreFoundation@0x1700a7 52 CoreFoundation CoreFoundation@0x1edd 53 libobjc.A.dylib libobjc.A.dylib@0xf049 54 AppKit AppKit@0x946aef 55 libsystem_c.dylib libsystem_c.dylib@0x4d15f 56 libsystem_c.dylib libsystem_c.dylib@0x4d46f 57 CoreFoundation CoreFoundation@0x38540 58 CarbonCore CarbonCore@0x2adf4 59 CarbonCore CarbonCore@0x2ad13 60 HIToolbox HIToolbox@0x65fa6 61 HIToolbox HIToolbox@0x18dfa 62 libsystem_c.dylib libsystem_c.dylib@0x3e2b4 63 libsystem_c.dylib libsystem_c.dylib@0x3e1ef 64 HIToolbox HIToolbox@0x23df 65 CoreFoundation CoreFoundation@0x4faf2 66 HIToolbox HIToolbox@0x18904 67 libsystem_c.dylib libsystem_c.dylib@0x4d15f 68 CoreFoundation CoreFoundation@0x635e7 69 CoreFoundation CoreFoundation@0x6348f 70 CoreFoundation CoreFoundation@0x38215 71 HIToolbox HIToolbox@0x24fe 72 HIToolbox HIToolbox@0x9c20 73 HIToolbox HIToolbox@0x9aad 74 AppKit AppKit@0x9190 75 libobjc.A.dylib libobjc.A.dylib@0x12cea 76 libsystem_c.dylib libsystem_c.dylib@0xa0788 77 libobjc.A.dylib libobjc.A.dylib@0xed52 78 CoreFoundation CoreFoundation@0x30e15 79 AppKit AppKit@0x7336f 80 libobjc.A.dylib libobjc.A.dylib@0xf049 81 libsystem_blocks.dylib libsystem_blocks.dylib@0x11e0 82 AppKit AppKit@0x8962 83 AppKit AppKit@0x2c0ada 84 AppKit AppKit@0x2c084f 85 AppKit AppKit@0xac0c 86 AppKit AppKit@0x6f403 87 CoreGraphics CoreGraphics@0x6cb98 88 CoreGraphics CoreGraphics@0x14a5c4 89 AppKit AppKit@0x94e949 90 AppKit AppKit@0x102f39 91 AppKit AppKit@0x6d86f 92 AppKit AppKit@0x884d1c 93 AppKit AppKit@0x8a94 94 AppKit AppKit@0x73dce

This is one of bug 678607's crashes. See bug 678607 comment #13.