It's happening the same to me, and I've seen other members of the arduino forum with the same problem.
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1280215307
See the OP's second post.
Here's the text that appears: (images and schematics above it show up fine btw)
Not Found
The requested URL /svn/trunk/build/shared/examples/Digital/Blink/Blink.pde was not found on this server.