[CR]Stress cracks on Super Record cranks?

(Example: Events:Eroica)

Date: Sun, 15 Oct 2006 19:59:05 -0700
From: "ryan hildebrand" <greengate@gmail.com>
To: classicrendezvous@bikelist.org
Subject: [CR]Stress cracks on Super Record cranks?

While cleaning my bike today I noticed some very small marks on my 1979 Super Record spider:

http://www.flickr.com/photos/90152663@N00/270880179/

http://www.flickr.com/photos/90152663@N00/270881016/

http://www.flickr.com/photos/90152663@N00/270881014/

http://www.flickr.com/photos/90152663@N00/270880178/

Are these stress cracks? How worried should I be? Please advise!

Ryan Hildebrand
Costa Mesa, Calif.