Assertion failure in GlossaryWC.nig when I open that in Interface Builder. Obviously iLocalize also had problems opening that nib:

Assertion Message: An uncaught exception was raised.
Exception Name: IBExpect Failure
Reason: Invalid archive. Every reference with a ref tag must have an object with a matching id tag.
User Info: (null)
Thread 0 Raised an Exception:
0 CoreFoundation 0x00007fff8a44e96a __exceptionPreprocess + 170
1 libobjc.A.dylib 0x00007fff85fcfd5e objc_exception_throw + 43
2 CoreFoundation 0x00007fff8a4d85a9 -[NSException raise] + 9
3 InterfaceBuilderKit 0x00000001001268f9 IBXMLVerifyReferenceIDs + 450
4 InterfaceBuilderKit 0x0000000100126918 IBXMLVerifyReferenceIDs + 481
5 InterfaceBuilderKit 0x0000000100126918 IBXMLVerifyReferenceIDs + 481
6 InterfaceBuilderKit 0x0000000100126918 IBXMLVerifyReferenceIDs + 481
7 InterfaceBuilderKit 0x0000000100126918 IBXMLVerifyReferenceIDs + 481
8 InterfaceBuilderKit 0x0000000100126918 IBXMLVerifyReferenceIDs + 481
9 InterfaceBuilderKit 0x0000000100126918 IBXMLVerifyReferenceIDs + 481
10 InterfaceBuilderKit 0x0000000100126918 IBXMLVerifyReferenceIDs + 481
11 InterfaceBuilderKit 0x000000010012608d -[IBXMLDecoder initForReadingWithData:error:] + 2582
12 InterfaceBuilderKit 0x00000001001255cc -[IBDocument readFromFileWrapper:ofType:error:] + 152
13 CocoaPlugin 0x0000000103a032ea
14 AppKit 0x00007fff851953b0 -[NSDocument readFromURL:ofType:error:] + 564
15 InterfaceBuilderKit 0x0000000100124ea9 -[IBDocument readFromURL:ofType:error:] + 142
16 AppKit 0x00007fff8505a374 -[NSDocument _initWithContentsOfURL:ofType:error:] + 137
17 AppKit 0x00007fff8505a28e -[NSDocument initWithContentsOfURL:ofType:error:] + 257
18 CocoaPlugin 0x0000000103a0221c
19 AppKit 0x00007fff851a2bf1 -[NSDocumentController makeDocumentWithContentsOfURL:ofType:error:] + 333
20 InterfaceBuilderKit 0x000000010022e121 -[IBDocumentController makeDocumentWithContentsOfURL:ofType:error:] + 75
21 AppKit 0x00007fff851ac4d1 -[NSDocumentController(NSDeprecated) openDocumentWithContentsOfURL:display:error:] + 810
22 InterfaceBuilderKit 0x0000000100174036 -[IBDocumentController openDocumentWithContentsOfURL:display:error:] + 730
23 AppKit 0x00007fff851a008c __-[NSDocumentController openDocumentWithContentsOfURL:display:completionHandler:]_block_invoke_4 + 648
24 AppKit 0x00007fff850341e5 -[NSDocumentController _openDocumentWithContentsOfURL:usingProcedure:] + 530
25 AppKit 0x00007fff8519fdf5 __-[NSDocumentController openDocumentWithContentsOfURL:display:completionHandler:]_block_invoke_3 + 252
26 libdispatch.dylib 0x00007fff88fb890a _dispatch_call_block_and_release + 18
27 libdispatch.dylib 0x00007fff88fba77a _dispatch_main_queue_callback_4CF + 308
28 CoreFoundation 0x00007fff8a3e3c0c __CFRunLoopRun + 1724
29 CoreFoundation 0x00007fff8a3e3216 CFRunLoopRunSpecific + 230
30 HIToolbox 0x00007fff82d9f4ff RunCurrentEventLoopInMode + 277
31 HIToolbox 0x00007fff82da6c21 ReceiveNextEventCommon + 355
32 HIToolbox 0x00007fff82da6aae BlockUntilNextEventMatchingListInMode + 62
33 AppKit 0x00007fff84ddf191 _DPSNextEvent + 659
34 AppKit 0x00007fff84ddea95 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 135
35 Interface Builder 0x0000000100003893
36 AppKit 0x00007fff84ddb3d6 -[NSApplication run] + 463
37 AppKit 0x00007fff8505952a NSApplicationMain + 867
38 Interface Builder 0x0000000100001be4