Bug #520: CRASH: Dies in _GetMenuBarWindow

See attached crash log. Excerpt is:

Thread 0 Crashed: 0 com.apple.HIToolbox 0x93006f61 _GetMenuBarWindow + 15 1 com.apple.HIToolbox 0x92df82bf MBarDraw() + 19 2 com.apple.HIToolbox 0x92def8e3 DrawMenuBar + 223 3 com.apple.HIToolbox 0x92defbb8 ShowBar(unsigned char, unsigned char) + 272 4 com.apple.HIToolbox 0x92defa6e SetMenuBarObscured + 180 5 com.apple.HIToolbox 0x92e52c0a HIApplication::HandleActivated(OpaqueEventRef*, unsigned char, OpaqueWindowPtr*) + 182 6 com.apple.HIToolbox 0x92dcfcd7 HIApplication::EventObserver(unsigned long, OpaqueEventRef*, void*) + 225 7 com.apple.HIToolbox 0x92dcc17e _NotifyEventLoopObservers + 162 8 com.apple.HIToolbox 0x92dcf880 AcquireEventFromQueue + 365 9 com.apple.HIToolbox 0x92dcd2b8 ReceiveNextEventCommon + 418 10 com.apple.HIToolbox 0x92dcd0ee BlockUntilNextEventMatchingListInMode + 81 11 com.apple.AppKit 0x9326f465 _DPSNextEvent + 572 12 com.apple.AppKit 0x9326f056 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 137 13 com.apple.AppKit 0x93268ddb -[NSApplication run] + 512 14 com.apple.AppKit 0x9325cd2f NSApplicationMain + 573 15 com.wincent.SynergyAdvance 0x00008206 start + 590 16 com.wincent.SynergyAdvance 0x000080c6 start + 270 17 com.wincent.SynergyAdvance 0x00007fe1 start + 41