In both cases (both the truly hidden stars and the incorrectly visible stars) the face is 'org-hide'. It's properties are all unspecified according to describe-face except for Foreground which is set to 'black'. I have set it to black using Customize, because by default they were white (and I'm using a black background).
Could this be an Emacs bug?

-- 

Christer Enfors

--- On Wed, 2/10/10, Carsten Dominik <carsten.dominik@gmail.com> wrote:

From: Carsten Dominik <carsten.dominik@gmail.com>
Subject: Re: [Orgmode] Leading stars not always hidden
To: "Christer Enfors" <cenfors@yahoo.com>
Cc: "Emacs org-mode" <emacs-orgmode@gnu.org>
Date: Wednesday, February 10, 2010, 7:20 PM


On Feb 10, 2010, at 6:54 PM, Christer Enfors wrote:

> Could it be a problem with my terminal? I'm using GLink, and I think the TERM environment variable is set to dtterm, if that's of any relevance.

Unfortunately, I have no idea.

If you go to the incorrectly visible stars and execute M-x describe-face RET, do you then get something different from when you do it on the normal hidden stars?

- Carsten


> 
> --Christer Enfors
> 
> 
> From: Carsten Dominik <carsten.dominik@gmail.com>
> To: Christer Enfors <cenfors@yahoo.com>
> Cc: Emacs org-mode <emacs-orgmode@gnu.org>
> Sent: Wed, February 10, 2010 6:03:18 PM
> Subject: Re: [Orgmode] Leading stars not always hidden
> 
> I have never seen this eeffect....
> 
> - Carsten
> 
> On Feb 10, 2010, at 4:13 PM, Christer Enfors wrote:
> 
> > I use org-indent-mode and (setq org-hide-leading-stars t). This mostly works, but sometimes the supposedly hidden stars are visible as white (my default foreground color) on some headlines. I'm not sure, but I think it's always the first and / or the last sibling headline that show this problem. The "middle" headings are never affected, if I remember correctly.
> >
> > Does anybody else have this problem? Is it a known bug?
> >
> > I've attached a screenshot (in a Word document, because my work computer doesn't have MS Paint or similar for some bizarre reason).
> >
> > - AIX 5.3
> > - Emacs 23.1.2
> > - Org-mode 6.34c
> >
> > --Christer Enfors
> >
> > <org-picture.doc>_______________________________________________
> > Emacs-orgmode mailing list
> > Please use `Reply All' to send replies to the list.
> > Emacs-orgmode@gnu.org
> > http://lists.gnu.org/mailman/listinfo/emacs-orgmode
> 
> - Carsten
> 
> 
> 
> 
> 

- Carsten