I got the following crashes at various points with cardlist escape evaluation turned on, which I think was caused by them being on.

Changing a card's model:

Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000000
Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   QtGui                               0x0a75c118 QPaintDevice::~QPaintDevice() + 328
1   QtGui                               0x0a8ba549 QMacStyle::drawPrimitive(QStyle::PrimitiveElement, QStyleOption const*, QPainter*, QWidget const*) const + 73
2   QtGui                               0x0aafb9e3 QItemDelegate::drawFocus(QPainter*, QStyleOptionViewItem const&, QRect const&) const + 243
3   QtGui.so                            0x0a0ec573 sipQItemDelegate::drawFocus(QPainter*, QStyleOptionViewItem const&, QRect const&) const + 107
4   QtGui                               0x0ab000dc QItemDelegate::paint(QPainter*, QStyleOptionViewItem const&, QModelIndex const&) const + 1500
5   QtGui.so                            0x0a0ecae2 sipQItemDelegate::disconnectNotify(char const*) + 358
6   org.python.python                   0x006bb165 PyEval_EvalFrameEx + 19429
7   org.python.python                   0x006bd2dd PyEval_EvalCodeEx + 2109
8   org.python.python                   0x0063a746 PyFunction_SetClosure + 1894
9   org.python.python                   0x00609d35 PyObject_Call + 85
10  org.python.python                   0x0061bb36 PyMethod_New + 2646
11  org.python.python                   0x00609d35 PyObject_Call + 85
12  org.python.python                   0x006b55be PyEval_CallObjectWithKeywords + 78
13  sip.so                              0x09f36470 initsip + 7131
14  QtGui.so                            0x09f46ae3 sipVH_QtGui_48(PyGILState_STATE, _object*, QPainter*, QStyleOptionViewItem const&, QModelIndex const&) + 143

Simply opening the browser:

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000009cc0e69c
Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   com.apple.QD                        0x9691d5d8 GetPenState + 41
1   QtGui                               0x0a569516 QPixmap::macQDHandle() const + 390
2   QtGui                               0x0a533ef0 QWidgetPrivate::setWindowIcon_sys(bool) + 352
3   QtGui                               0x0a50a613 QWidget::create(int, bool, bool) + 739
4   QtGui                               0x0a5059d5 QWidgetPrivate::createWinId(int) + 325
5   QtGui                               0x0a903b09 QToolBar::setAllowedAreas(QFlags) + 889
6   QtGui                               0x0a903db4 QToolBar::QToolBar(QWidget*) + 244
7   QtGui.so                            0x09e9de43 sipQToolBar::sipQToolBar(QWidget*) + 31
8   QtGui.so                            0x09ea1d6f sipQToolBar::disconnectNotify(char const*) + 9801
9   sip.so                              0x09e37e54 sip_api_common_dtor + 6569
10  org.python.python                   0x0066f2c0 PyType_GenericNew + 18368
11  org.python.python                   0x00609d35 PyObject_Call + 85
...

Deleting several tags at once:

Traceback (most recent call last):
  File "anki/hooks.pyc", line 61, in repl
  File "/Users/zak/Library/Application Support/Anki/plugins/CodeInCards.py", line 405, in cardListData
    card = self.getCard(index)
  File "ankiqt/ui/cardlist.pyc", line 206, in getCard
  File "anki/hooks.pyc", line 58, in repl
  File "ankiqt/ui/main.pyc", line 2630, in checkProgressHandler
Exception: Accessed DB while in progress handler

A short while after doing something vaguely clipboardy:

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   QtGui                               0x0a626a17 QClipboard::clear(QClipboard::Mode) + 2599
1   QtCore                              0x09e10ac9 QCoreApplication::flush() + 41
2   QtGui                               0x0a9406dd QAbstractButton::mousePressEvent(QMouseEvent*) + 429
3   QtGui                               0x0a940940 QAbstractButton::mouseReleaseEvent(QMouseEvent*) + 128
4   QtGui                               0x0aa10afc QToolButton::mouseReleaseEvent(QMouseEvent*) + 28
5   QtGui                               0x0a60d978 QWidget::event(QEvent*) + 3736