Calling QPrintDialog::exec() results in a crash

It seems that under some circumstances, a call to QPrintDialog::exec() can result in a crash. I have not yet been able to create a small example, but in our application (that uses threading and openGL, but no ActiveX) it happens 100% of the time. When tracing the issue, the last call inside Qt is in qprintdialog_win.cpp line 253: the call to PrintDlgEx. I managed to get the following stacktrace:

0 RpcpReportFatalError RPCRT4 0x765022d3
1 RpcpRaiseException RPCRT4 0x764be10e
2 RpcRaiseException RPCRT4 0x764be0d1
3 ObjectStublessClient stblsclt.cxx 467 0x74d90531
4 ObjectStubless stubless.asm 154 0x74c898ad
5 CPrintDialog::CreatePrintBrowser COMDLG32 0x74a25f1e
6 CPrintDialog::OnInitDialog COMDLG32 0x74a26ab5
7 Print_InitDialog COMDLG32 0x74a269dc
8 Print_GeneralDlgProc COMDLG32 0x74a2696a
9 InternalCallWinProc USER32 0x7550c4e7
10 UserCallDlgProcCheckWow USER32 0x75525855
11 DefDlgProcWorker USER32 0x755259f3
12 DefDlgProcW USER32 0x75525be3
13 InternalCallWinProc USER32 0x7550c4e7
14 UserCallWinProcCheckWow USER32 0x7550c5e7
15 DispatchClientMessage USER32 0x75504f0e
16 __fnDWORD USER32 0x75504f7d
17 KiUserCallbackDispatcher ntdll 0x76de6fce
18 NtUserMessageCall USER32 0x75504f51
19 SendMessageWorker USER32 0x75500940
20 InternalCreateDialog USER32 0x75524f6c
21 CreateDialogIndirectParamAorW USER32 0x7552535a
22 CreateDialogIndirectParamW USER32 0x7551ea2b
23 _CreatePageDialog COMCTL32 0x6f514da0
24 _CreatePage COMCTL32 0x6f514ee2
25 PageChange COMCTL32 0x6f51732e
26 InitPropSheetDlg COMCTL32 0x6f518ea5
27 PropSheetDlgProc COMCTL32 0x6f51974b
28 InternalCallWinProc USER32 0x7550c4e7
29 UserCallDlgProcCheckWow USER32 0x75525855
30 DefDlgProcWorker USER32 0x755259f3
31 DefDlgProcW USER32 0x75525be3
32 InternalCallWinProc USER32 0x7550c4e7
33 UserCallWinProcCheckWow USER32 0x7550c5e7
34 DispatchClientMessage USER32 0x75504f0e
35 __fnDWORD USER32 0x75504f7d
36 KiUserCallbackDispatcher ntdll 0x76de6fce
37 NtUserMessageCall USER32 0x75504f51
38 SendMessageWorker USER32 0x75500940
39 InternalCreateDialog USER32 0x75524f6c
40 CreateDialogIndirectParamAorW USER32 0x7552535a
41 CreateDialogIndirectParamW USER32 0x7551ea2b
42 _RealPropertySheet COMCTL32 0x6f519d77
43 _PropertySheet COMCTL32 0x6f519fc5
44 PropertySheetW COMCTL32 0x6f519fe0
45 Print_InvokePropertySheets COMDLG32 0x74a24fea
46 PrintDlgExX COMDLG32 0x74a24d53
47 PrintDlgExW COMDLG32 0x74a24bc4
48 ZN12QPrintDialog4execEv QtGuid4 0x27a6e8c
49 ZN12QPrintDialog4execEv QtGuid4 0x27a6d38
50 Cassinid 0x42b03a
51 Cassinid 0x42df6b
52 Cassinid 0x45ffb1
53 ZN11QMetaObject8activateEP7QObjectPKS_iPPv QtCored4 0x6a22928b
54 ZN7QAction9triggeredEb QtGuid4 0x22ff860
55 ZN7QAction8activateENS_11ActionEventE QtGuid4 0x22fed35
56 ZN7QAction7triggerEv QtGuid4 0x2a59949
57 ZN11QToolButton14nextCheckStateEv QtGuid4 0x2773d67
58 ZNK12QButtonGroup9checkedIdEv QtGuid4 0x269d8a6
59 ZN15QAbstractButton17mouseReleaseEventEP11QMouseEvent QtGuid4 0x269eddd
60 ZN11QToolButton17mouseReleaseEventEP11QMouseEvent QtGuid4 0x27728d4
61 ZN7QWidget5eventEP6QEvent QtGuid4 0x23563de
62 ZN15QAbstractButton5eventEP6QEvent QtGuid4 0x269ec68
63 ZN11QToolButton5eventEP6QEvent QtGuid4 0x2773dc6
64 ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent QtGuid4 0x230c020
65 ZN12QApplication6notifyEP7QObjectP6QEvent QtGuid4 0x230a26a
66 Cassinid 0x41478f
67 ZN16QCoreApplication14notifyInternalEP7QObjectP6QEvent QtCored4 0x6a213252
68 ZN16QAccessibleEvent8setValueERK7QString QtGuid4 0x29a0246
69 ZN19QApplicationPrivate14sendMouseEventEP7QWidgetP11QMouseEventS1_S1_PS1_R8QPointerIS0_Eb QtGuid4 0x2308ad6
70 ZN12QApplication16winMouseButtonUpEv QtGuid4 0x2373171
71 ZN12QApplication8winFocusEP7QWidgetb QtGuid4 0x236df66
72 InternalCallWinProc USER32 0x7550c4e7
73 UserCallWinProcCheckWow USER32 0x7550c5e7
74 DispatchMessageWorker USER32 0x7550cc19
75 DispatchMessageW USER32 0x7550cc70
76 ZN21QEventDispatcherWin3213processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE QtCored4 0x6a239cc6
77 Z24qt_getRegisteredWndClassv QtGuid4 0x236ca06
78 ZN10QEventLoop13processEventsE6QFlagsINS_17ProcessEventsFlagEE QtCored4 0x6a210e76
79 ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE QtCored4 0x6a210fcc
80 ZN16QCoreApplication4execEv QtCored4 0x6a21381c
81 ZN12QApplication4execEv QtGuid4 0x230961a
82 Cassinid 0x4029df
83 Cassinid 0x4638a2
84 Cassinid 0x4635c8
85 Cassinid 0x40124b
86 Cassinid 0x4012b8
87 BaseThreadInitThunk kernel32 0x74bbed6c
88 __RtlUserThreadStart ntdll 0x76e0377b
89 _RtlUserThreadStart ntdll 0x76e0374e