OK - the full crash log is 102kb, not something to post here.
The top 20 lines of the call-stack from the thread that crashed follow.
What I did to cause this was launch CodeBlocks through the OSX GUI, Select the Settings menu, then Editor.
I changed the tab spacing from 4 to 3, then hit OK --> Boom!
Process: CodeBlocks [65779]
Path: /Users/alisdairmeredith/CodeBlocks/CodeBlocks.app/Contents/MacOS/CodeBlocks
Identifier: org.codeblocks.app
Version: 10.05 (6282)
Code Type: X86 (Native)
Parent Process: launchd [80]
Date/Time: 2010-05-31 16:42:50.621 -0400
OS Version: Mac OS X 10.6.3 (10D573)
Report Version: 6
Interval Since Last Report: 77492 sec
Crashes Since Last Report: 11
Per-App Interval Since Last Report: 11165 sec
Per-App Crashes Since Last Report: 9
Anonymous UUID: 785258E7-5E29-470B-AB52-1CC1EB071A1F
Exception Type: EXC_CRASH (SIGILL)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Thread 0 Crashed: Dispatch queue: com.apple.main-thread
0 libkeybinder.so 0x17a93897 wxKeyBinder::UpdateSubMenu(wxMenu*) + 227
1 libkeybinder.so 0x17a93a1a wxKeyBinder::UpdateAllCmd(wxMenuBar*) + 70
2 libkeybinder.so 0x17a8bfc9 cbKeyBinder::OnKeyConfigDialogDone(MyDialog*) + 261
3 libkeybinder.so 0x17a8c31d MyDialog::OnApply() + 27
4 libcodeblocks.0.dylib 0x00157ff0 EditorConfigurationDlg::EndModal(int) + 9812
5 libwx_macu-2.8.0.dylib 0x007a3982 wxDialogBase::AcceptAndClose() + 64
6 libwx_macu-2.8.0.dylib 0x006ce77e wxEvtHandler::ProcessEventIfMatches(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&) + 108
7 libwx_macu-2.8.0.dylib 0x006ce915 wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*) + 103
8 libwx_macu-2.8.0.dylib 0x006ced99 wxEvtHandler::ProcessEvent(wxEvent&) + 183
9 libwx_macu-2.8.0.dylib 0x00804e49 wxWindowBase::TryParent(wxEvent&) + 85
10 libwx_macu-2.8.0.dylib 0x006ced4f wxEvtHandler::ProcessEvent(wxEvent&) + 109
11 libwx_macu-2.8.0.dylib 0x006fd0e3 wxControl::ProcessCommand(wxCommandEvent&) + 27
12 libwx_macu-2.8.0.dylib 0x006f899c wxButton::MacControlHit(void*, void*) + 62
13 libwx_macu-2.8.0.dylib 0x007598f3 wxMacWindowControlEventHandler(OpaqueEventHandlerCallRef*, OpaqueEventRef*, void*) + 553
14 libwx_macu-2.8.0.dylib 0x0075a259 wxMacWindowEventHandler(OpaqueEventHandlerCallRef*, OpaqueEventRef*, void*) + 309
15 com.apple.HIToolbox 0x98edc0a9 DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*) + 1567
16 com.apple.HIToolbox 0x98edb370 SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, HandlerCallRec*) + 411
17 com.apple.HIToolbox 0x98efdb55 SendEventToEventTarget + 52
18 com.apple.HIToolbox 0x98f4cf7a SendControlHit(HIView*, OpaqueEventRef*, short, unsigned long) + 296
19 com.apple.HIToolbox 0x98f4cdfb HIView::NotifyControlHit(OpaqueEventRef*, short, unsigned long) + 45