Note that the problem doesn't just occur when the cursor is blinking.  
A solid cursor will leave little "trails" as well.

I think this may have been mentioned earlier in this old thread.

-Adam

PS Adrian, I am really, really sorry for having cc'd my initial  
response to you but not the list just a minute ago. Let me take this  
opportunity to thank you for keeping emacs.app going. It's great.

On Feb 22, 2008, at 9:32 AM, Adrian Robert wrote:

> On Thu, Feb 21, 2008 at 9:40 PM, Ben Lowery <[EMAIL PROTECTED]> wrote:
>> On Wed, Dec 5, 2007 at 11:02 AM, Peter Jones <[EMAIL PROTECTED]>  
>> wrote:
>>> Adrian Robert wrote the following on Wed, Dec 05, 2007 at  
>>> 07:28:49AM +0300:
>>>
>>>> One question: are you able to observe the bug when there is only  
>>>> ONE
>>>> active frame with ONE active window?
>>>
>>> I first noticed this problem in rc2, with only one frame and one
>>> window.  I'm back on rc2 now (because of emacsclient) and will  
>>> post a
>>> screenshot of this if I see it.
>>>
>>> P.S., I'm also running on leopard (which was a huge mistake).
>>
>> Did anyone ever get a chance to look into this? I see it daily on
>> 10.5.2. I'd be happy to dig around in the code a bit if I knew where
>> to start looking....
>
>
> ns_draw_window_cursor() in nsterm.m draws the cursor and is also
> responsible for erasing during blink cases.  Cursor blink itself is
> handled by [EmacsApp -cursor_blink_handler:] in that same file, which
> is called periodically during event processing.  It uses kind of a
> hack by calling update_window_cursor().
>
> Ideally this would be removed and the code switched to use emacs
> core's standard means for doing cursor blink.  (The reason for the
> different impl is blinking cursors were supported by this port before
> emacs itself supported them.)
>
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=================================
Adam M. Goldstein PhD MSLIS
Assistant Professor of Philosophy
Iona College
--
email:  [EMAIL PROTECTED]
web:    http://www.iona.edu/faculty/agoldstein/
tel:    (914) 637-2717
post:   Iona College
         Department of Philosophy
         715 North Avenue
         New Rochelle, NY 10801





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