Strange NSSlider / NSUserDefaults interaction

FROM : Stephen Deken
DATE : Wed Aug 30 18:32:24 2006

Hello all,

I've just found a rather strange bug that impacts NSSliders when an 
invalid registered default is written to NSUserDefaults.  Once the 
invalid value is written, all NSSliders will no longer track the 
mouse -- instead they will 'snap back' when the mouse leaves a region 
loosely defined by the height of the control and the width of the 
screen.

I have a simple project (too large to post here) that demonstrates 
this problem, but the offending line is this:

   [[NSUserDefaults standardUserDefaults] registerDefaults:
[NSDictionary dictionaryWithObjectsAndKeys: [NSColor blackColor], 
@"dumb2", nil]];

Instead of [NSColor blackColor], I should have written [NSArchiver 
archivedDataWithRootObject:[NSColor blackColor]] -- that resolves the 
problem.

Has anyone else seen this behavior?  Is there a rdar: bug on this?

Stephen Deken
stephen.<email_removed>