2013-09-03 12:18:55.814 Nimbus[638:a0b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'NSConcreteMutableAttributedString addAttribute:value:range:: nil value'
*** First throw call stack:
(
0 CoreFoundation 0x021a56f4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x017f28b6 objc_exception_throw + 44
2 CoreFoundation 0x021a54cb +[NSException raise:format:] + 139
3 Foundation 0x01219fbf -[NSConcreteMutableAttributedString addAttribute:value:range:] + 125
4 Nimbus 0x00036d69 -[NIAttributedLabel _applyLinkStyleWithResults:toAttributedString:] + 905
5 Nimbus 0x0003738b -[NIAttributedLabel mutableAttributedStringWithAdditions] + 251
6 Nimbus 0x00039f15 -[NIAttributedLabel drawTextInRect:] + 229
7 UIKit 0x0050e12e -[UILabel drawRect:] + 98
8 UIKit 0x003c7966 -[UIView(CALayerDelegate) drawLayer:inContext:] + 504
9 QuartzCore 0x0491b209 -[CALayer drawInContext:] + 123
10 QuartzCore 0x0491b13a _ZL16backing_callbackP9CGContextPv + 96
11 QuartzCore 0x0480c514 CABackingStoreUpdate_ + 2656
12 QuartzCore 0x0491b0d2 ___ZN2CA5Layer8display_Ev_block_invoke + 93
13 QuartzCore 0x0494ef63 x_blame_allocations + 15
14 QuartzCore 0x0491af3d _ZN2CA5Layer8display_Ev + 1519
15 QuartzCore 0x0491b189 -[CALayer _display] + 33
16 QuartzCore 0x0491a946 _ZN2CA5Layer7displayEv + 144
17 QuartzCore 0x0491b163 -[CALayer display] + 33
18 QuartzCore 0x0490f313 _ZN2CA5Layer17display_if_neededEPNS_11TransactionE + 323
19 QuartzCore 0x0490f38c _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 38
20 QuartzCore 0x04877306 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 294
21 QuartzCore 0x04878691 _ZN2CA11Transaction6commitEv + 393
22 QuartzCore 0x04878d64 _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 92
23 CoreFoundation 0x0216d5fe __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
24 CoreFoundation 0x0216d54f __CFRunLoopDoObservers + 399
25 CoreFoundation 0x0214b474 __CFRunLoopRun + 1076
26 CoreFoundation 0x0214abf3 CFRunLoopRunSpecific + 467
27 CoreFoundation 0x0214aa0b CFRunLoopRunInMode + 123
28 GraphicsServices 0x020d0a27 GSEventRunModal + 192
29 GraphicsServices 0x020d084e GSEventRun + 104
30 UIKit 0x0035df0b UIApplicationMain + 1225
31 Nimbus 0x00005f2d main + 141
32 Nimbus 0x00005e95 start + 53
)
libc++abi.dylib: terminating with uncaught exception of type NSException
And, some UI layout looks incorrect.