NIB loader problem

[Luboš Doležel]

Hi,

as part of my OS X loader, I'm not trying out various Cocoa apps, one of 
them being Bayon.

https://itunes.apple.com/us/app/bayon/id532348700?mt=12

When starting the application under GNUstep/Linux, I get the following 
error:

2012-11-06 12:57:34.728 Bayon[10234] NSView.m:4685  Assertion failed in 
NSSplitView(instance), method initWithCoder:. 
NSInternalInconsistencyException
2012-11-06 12:57:34.729 Bayon[10234] Exception occured while loading 
model: NSView.m:4685  Assertion failed in NSSplitView(instance), method 
initWithCoder:.  NSInternalInconsistencyException
2012-11-06 12:57:34.729 Bayon[10234] Failed to load Nib
2012-11-06 12:57:34.730 Bayon[10234] BNMainWindowController: could not 
load nib named BNMainWindowController.nib

The assertion in question is: [sub class] != [NSCustomView class]

The problematic .nib file is attached. For obvious reasons, I can mail 
the whole commercial app here.

I can't absolutely rule out a bug in my loader (I do have unit tests 
though), but Gorm not being able to load the file either hints at a 
possible bug in GNUstep.

Could someone in the know please quickly take a look at it?

Thanks a lot!
--
Luboš Doležel

BNMainWindowController.nib
Description: Binary data