Lion exception

[Jonathan Lundell]

Twice on startup; after that it seems to work. FWIW, I've updated Python from python.org and installed a current hg. (That's not what broke it; I was trying to get it to work.) Issue filed.

Uncaught exception: NSRangeException
*** -[__NSArrayI objectAtIndex:]: index 18446744073709551615 beyond bounds [0 .. 1]

-[__NSArrayI objectAtIndex:] (in CoreFoundation) + 208
-[BWSelectableToolbar selectItemAtIndex:] (in BWToolkitFramework) + 78
-[BWSelectableToolbar initialSetup] (in BWToolkitFramework) + 1400
__NSFireDelayedPerform (in Foundation) + 392
__CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ (in CoreFoundation) + 20
__CFRunLoopDoTimer (in CoreFoundation) + 534
__CFRunLoopRun (in CoreFoundation) + 1617
CFRunLoopRunSpecific (in CoreFoundation) + 230
RunCurrentEventLoopInMode (in HIToolbox) + 277
ReceiveNextEventCommon (in HIToolbox) + 181
BlockUntilNextEventMatchingListInMode (in HIToolbox) + 62
_DPSNextEvent (in AppKit) + 659
-[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in AppKit) + 135
-[NSApplication run] (in AppKit) + 463