I getting a lot of hard crashes on osx 10.9 h13.0.378 . no matter what I try I cannot replicate this issue in any set of steps. Is anyone else getting this ?
.What makes it so hard is not being able to re create it via a set of known steps.

2 libHoudiniUI.dylib 0x0000000107a31064 AP_Interface::coreDumpChaser(UTsignalHandlerArg) + 644
3 libHoudiniUI.dylib 0x0000000107a33b9e AP_Interface::si_CrashHandler::chaser(UTsignalHandlerArg) + 46
4 libHoudiniUT.dylib 0x000000010aeac7d5 signalCallback(UTsignalHandlerArg) + 677
5 libHoudiniUT.dylib 0x000000010b07b288 UT_Signal::processSignal(int, __siginfo*, void*) + 168
6 libsystem_platform.dylib 0x00007fff8d7065aa _sigtramp + 26
7 ??? 0x00007fff5d1f8870 0x0 + 140734755735664
8 libHoudiniAPPS3.dylib 0x0000000102cf287d GUI_DetailRender3D::defineLights(RE_Render*, int, bool, bool, bool, bool) + 173
9 libHoudiniAPPS3.dylib 0x0000000102a5ba25 DM_GL2PortAgent3D::doMultiLightRender(RE_Render*, int, int, GUI_DisplayOption*, bool) + 629
10 libHoudiniAPPS3.dylib 0x0000000102a5b18e DM_GL2PortAgent3D::doHighQualityRender(RE_Render*, int, int, GUI_DisplayOption*, bool&) + 606
11 libHoudiniAPPS3.dylib 0x0000000102a6350f DM_GL2PortAgent3D::doRenderBeautyPass(RE_Render*, int, int, bool, bool, GUI_DisplayOption*) + 751
12 libHoudiniAPPS3.dylib 0x0000000102a62f24 DM_GL2PortAgent3D::renderSceneView(RE_Render*, int, int, bool, bool) + 324
13 libHoudiniAPPS3.dylib 0x0000000102aba1e9 DM_VPortAgent3D::renderViewport(RE_Render*, int, int, bool, bool) + 1801
14 libHoudiniAPPS3.dylib 0x0000000102abe987 DM_VPortAgent3D::doRender(RE_Render*, int, int) + 471
15 libHoudiniAPPS3.dylib 0x0000000102ad8101 DM_Viewport::doRender(RE_Render*, int, int) + 881
16 libHoudiniUI.dylib 0x0000000107c17869 UI_Feel::renderMe(RE_Render*, int, int) + 1289
17 libHoudiniUI.dylib 0x0000000107c1ad7b UI_Feel::doRenderKids(RE_Render*, int, int) + 171
18 libHoudiniUI.dylib 0x0000000107c1ab89 UI_Feel::doRender(RE_Render*, int, int) + 185
19 libHoudiniUI.dylib 0x0000000107c17869 UI_Feel::renderMe(RE_Render*, int, int) + 1289
20 libHoudiniUI.dylib 0x0000000107c1ad7b UI_Feel::doRenderKids(RE_Render*, int, int) + 171
21 libHoudiniUI.dylib 0x0000000107c1ab89 UI_Feel::doRender(RE_Render*, int, int) + 185
22 libHoudiniUI.dylib 0x0000000107cd7594 UI_Viewport::reRender(RE_Render*, bool) + 148
23 libHoudiniUI.dylib 0x0000000107cdb95d UI_Window::renderChildViews(RE_Render*) + 925
24 libHoudiniUI.dylib 0x0000000107cdbce8 UI_Window::doRedraw() + 520
25 libHoudiniUI.dylib 0x0000000107c81c06 UI_Queue::doWindowRedraws() + 790
26 libHoudiniUI.dylib 0x0000000107cc56b6 UI_Timer::handleEvent(UI_Event*) + 38
27 libHoudiniUI.dylib 0x0000000107c817dd UI_Queue::processNextEvent() + 733
28 libHoudiniUI.dylib 0x0000000107c814a4 UI_Queue::drain() + 148
29 libHoudiniUI.dylib 0x0000000107c80e13 UI_Queue::drainEvents(bool, bool) + 131
30 libHoudiniUI.dylib 0x0000000107a418d3 - + 131
31 Foundation 0x00007fff94a410f4 __NSFireTimer + 96
32 CoreFoundation 0x00007fff935c3564 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
33 CoreFoundation 0x00007fff935c309f __CFRunLoopDoTimer + 1151
34 CoreFoundation 0x00007fff936345aa __CFRunLoopDoTimers + 298
35 CoreFoundation 0x00007fff9357e8e5 __CFRunLoopRun + 1525
36 CoreFoundation 0x00007fff9357e0b5 CFRunLoopRunSpecific + 309
37 HIToolbox 0x00007fff8d46ba0d RunCurrentEventLoopInMode + 226
38 HIToolbox 0x00007fff8d46b7b7 ReceiveNextEventCommon + 479
39 HIToolbox 0x00007fff8d46b5bc _BlockUntilNextEventMatchingListInModeWithFilter + 65
40 AppKit 0x00007fff8c77b3de _DPSNextEvent + 1434
41 AppKit 0x00007fff8c77aa2b - + 122
42 libHoudiniUI.dylib 0x0000000107a41ad3 - + 243
43 Foundation 0x00007fff94a40cb7 __NSFireDelayedPerform + 333
44 CoreFoundation 0x00007fff935c3564 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
45 CoreFoundation 0x00007fff935c309f __CFRunLoopDoTimer + 1151
46 CoreFoundation 0x00007fff936345aa __CFRunLoopDoTimers + 298
47 CoreFoundation 0x00007fff9357e8e5 __CFRunLoopRun + 1525
48 CoreFoundation 0x00007fff9357e0b5 CFRunLoopRunSpecific + 309
49 HIToolbox 0x00007fff8d46ba0d RunCurrentEventLoopInMode + 226
50 HIToolbox 0x00007fff8d46b7b7 ReceiveNextEventCommon + 479
51 HIToolbox 0x00007fff8d46b5bc _BlockUntilNextEventMatchingListInModeWithFilter + 65
52 AppKit 0x00007fff8c77b3de _DPSNextEvent + 1434
53 AppKit 0x00007fff8c77aa2b - + 122
54 AppKit 0x00007fff8c76eb2c - + 553
55 AppKit 0x00007fff8c759913 NSApplicationMain + 940
56 libHoudiniUI.dylib 0x0000000107a34df3 main + 3363
57 houdinifx 0x0000000102a00fd4 start + 52
58 ??? 0x0000000000000001 0x0 + 1

Are you running HQ Lighting? The stack seems to indicate that, and it's also taking a little used codepath because the regular HQ Lighting process appears to be failing. Try using normal lighting, and I'll see if I can track down the issue.

If you're only using normal lighting,then the stack trace is probably a little inaccurate.