16.11.13 16:53:34,399 Mail[1783]: Cannot remove an observer <ConversationViewController 0x6000003a0000> for the key path "loaded" from <MessageViewController 0x60800014fba0> because it is not registered as an observer.
16.11.13 16:53:34,400 Mail[1783]: (
0 CoreFoundation 0x00007fff89eeb41c __exceptionPreprocess + 172
1 libobjc.A.dylib 0x00007fff8343fe75 objc_exception_throw + 43
2 CoreFoundation 0x00007fff89eeb2cc +[NSException raise:format:] + 204
3 Foundation 0x00007fff8b0d34e1 -[NSObject(NSKeyValueObserverRegistration) _removeObserver:forProperty:] + 480
4 Foundation 0x00007fff8b0d325a -[NSObject(NSKeyValueObserverRegistration) removeObserver:forKeyPath:] + 119
5 Foundation 0x00007fff8b0e2c32 -[NSObject(NSKeyValueObserverRegistration) removeObserver:forKeyPath:context:] + 231
6 Mail 0x0000000104262ca7 Mail + 498855
7 Mail 0x00000001042628cd Mail + 497869
8 Foundation 0x00007fff8b0c2150 __NSIndexSetEnumerate + 1062
9 Mail 0x0000000104241b5e Mail + 363358
10 Mail 0x000000010431dc0e Mail + 1264654
11 Mail 0x0000000104240b41 Mail + 359233
12 Mail 0x0000000104208c10 Mail + 130064
13 Foundation 0x00007fff8b071c18 NSKeyValueNotifyObserver + 387
14 Foundation 0x00007fff8b0aee71 -[NSObject(NSKeyValueObservingPrivate) _notifyObserversForKeyPath:change:] + 1115
15 AppKit 0x00007fff84b17c48 -[NSController _notifyObserversForKeyPath:change:] + 209
16 AppKit 0x00007fff84c496a7 -[NSArrayController didChangeValuesForArrangedKeys
bjectKeys:indexKeys:] + 53
17 AppKit 0x00007fff84b17a88 -[NSArrayController setContent:] + 826
18 Mail 0x0000000104206803 Mail + 120835
19 Mail 0x00000001042085ff Mail + 128511
20 Mail 0x0000000104234a2b Mail + 309803
21 Mail 0x000000010420b8d4 Mail + 141524
22 Mail 0x0000000104215169 Mail + 180585
23 Mail 0x0000000104234084 Mail + 307332
24 Mail 0x0000000104233d21 Mail + 306465
25 CoreFoundation 0x00007fff89eb9fcc __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
26 CoreFoundation 0x00007fff89dadc5d _CFXNotificationPost + 2893
27 Foundation 0x00007fff8b06b4aa -[NSNotificationCenter postNotificationName
bject:userInfo:] + 68
28 AppKit 0x00007fff84bcee2f -[NSTableView _sendSelectionChangedNotificationForRows:columns:] + 177
29 AppKit 0x00007fff84afb3c4 -[NSTableView _enableSelectionPostingAndPost] + 406
30 AppKit 0x00007fff84caa54c -[NSTableView mouseDown:] + 5588
31 Mail 0x00000001042614c1 Mail + 492737
32 AppKit 0x00007fff84c93d08 -[NSWindow sendEvent:] + 11296
33 AppKit 0x00007fff84c32744 -[NSApplication sendEvent:] + 2021
34 Mail 0x000000010422b381 Mail + 271233
35 AppKit 0x00007fff84a82a29 -[NSApplication run] + 646
36 AppKit 0x00007fff84a6d803 NSApplicationMain + 940
37 libdyld.dylib 0x00007fff857e35fd start + 1
)