View controller uses one nib fine but crashes with another-Collection of common programming errors

I’m working on a universal app and the iPhone version works just fine. I created a new nib for iPad and set the files owner to be the viewcontroller class. The I connected all the IBOutlets and IBActions. When I run the app on an iPad (and in the iPad simulator) it crashes when I touch any of the controls. I tried setting break points in the IBActions for each but it doesn’t even make it to those before the crash happens. What’s going on?

Backtrace: * thread #1: tid = 0x1f03, 0x0189809b libobjc.A.dylibobjc_msgSend + 15, stop reason = EXC_BAD_ACCESS (code=2, address=0x15) frame #0: 0x0189809b libobjc.A.dylibobjc_msgSend + 15 frame #1: 0x0020f14e UIKit-[UIApplication sendAction:to:from:forEvent:] + 96 frame #2: 0x0020f0e6 UIKit-[UIApplication sendAction:toTarget:fromSender:forEvent:] + 61 frame #3: 0x002b5ade UIKit-[UIControl sendAction:to:forEvent:] + 66 frame #4: 0x002b5fa7 UIKit-[UIControl(Internal) _sendActionsForEvents:withEvent:] + 503 frame #5: 0x002b5b13 UIKit-[UIControl sendActionsForControlEvents:] + 48 frame #6: 0x00304462 UIKit-[UISegmentedControl _setSelectedSegmentIndex:notify:] + 684 frame #7: 0x00305dd0 UIKit-[UISegmentedControl touchesBegan:withEvent:] + 1026 frame #8: 0x002342cf UIKit-[UIWindow sendTouchesForEvent:] + 272 frame #9: 0x002345e6 UIKit-[UIWindow sendEvent:] + 273 frame #10: 0x0021adc4 UIKit-[UIApplication sendEvent:] + 464 frame #11: 0x0020e634 UIKit_UIApplicationHandleEvent + 8196 frame #12: 0x021c0ef5 GraphicsServicesPurpleEventCallback + 1274 frame #13: 0x012a1195 CoreFoundation__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53 frame #14: 0x01205ff2 CoreFoundation_CFRunLoopDoSource1 + 146 frame #15: 0x012048da CoreFoundation__CFRunLoopRun + 2218 frame #16: 0x01203d84 CoreFoundationCFRunLoopRunSpecific + 212 frame #17: 0x01203c9b CoreFoundationCFRunLoopRunInMode + 123 frame #18: 0x021bf7d8 GraphicsServicesGSEventRunModal + 190 frame #19: 0x021bf88a GraphicsServicesGSEventRun + 103 frame #20: 0x0020c626 UIKitUIApplicationMain + 1163 frame #21: 0x00001d8d gravity`main + 141 at main.m:16