Problem:
--------

On some Mac systems running Mac OS X 10.6.8, in some cases (usually when the 
available physical memory had been super low for a while but then has returned 
to normal levels), the Internet connection is advertised to be down by Safari, 
Apple Mail, Opera, Firefox, OmniWeb and a bunch of other GUI apps.

But when you run command line tools such as curl, nslookup, ftp, it works 
perfectly fine. A remote ARD connection to the Mac systems still works, iChat 
still works.

Wild guess:
-----------

I would tend to assume that curl, nslookup and ftp are not using NSURL* 
(NSURLConnection, NSURLRequest, etc.) or CFNetwork APIs while the GUI 
applications probably are. So I'm wondering whether there would not have been a 
known issue with these APIs in Snow Leopard after they had to face memory 
constraints.

Question:
---------

Has there been such a known issue?


Note:
-----

Usually, rebooting these Mac systems fixes the issue.


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