Bug 9214 fixed the original issue with loading images on the U.S. Patent Office web site (uspto.gov), but the issue seems to have returned.
* STEPS TO REPRODUCE
1. Open URL: <http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=7&f=G&l=50&co1=AND&d=PTXT&s1=Apple.ASNM.&OS=AN/Apple&RS=AN/Apple>
2. Click on "Images" link at top of the page.
* EXPECTED RESULTS
The page loads and displays the TIFF image.
* ACTUAL RESULTS
The page loads but fails to display the TIFF image.
This is a regression. I don't have older versions of Safari available right now to test which version it regressed in, though.
You can "work around" the issue by double-clicking on the src attribute of the <embed> tag in the Web Inspector, then hitting Enter to accept the (unchanged) value. This causes the image to be loaded on the web page.
Not a WebKit bug, <rdar://problem/7132190>