CoreAnimation weird problems with NSView animator

FROM : Milen Dzhumerov
DATE : Wed Mar 26 17:12:15 2008

Hi all,

I've been playing with CA today and encountered some weird problems. 
Firstly, I tested setHidden: on an animator on a NSSegmentedView and 
it worked fine - it gets faded in/out. Now, all the problems I 
encountered happen in another NIB file. I've got the following piece 
of code (in a controller):

[self.generalView setHidden:YES];
[self.window setContentView:self.generalView];
[[self.generalView animator] setHidden:NO];

I expect this to animate the view but it doesn't happen - no animation 
goes on. I've made sure that all NSView's want layers. I also noticed 
some other unusual problems
with the said NIB:
- Animations work on a random basis (CA animations)
- If I attach an outlet to a particular NSPopUpButton, it disappears. 
Removing the outlet makes it appear again

I think I'm missing some setup here but I cannot figure out exactly 
what it is. The NIB (saved as a XIB) was created from scratch (i.e., 
not included in a project template) but I can't see how this can be a 
problem. Any help is greatly appreciated.

M