Safari anchor tag not scrolling to correct position

I run a vBulletin forum and I noticed that Safari running on 10.8.2 OSX or Safari Mobile running on iOS 6.1 will not scroll to the correct anchor. This link should scroll to post #10:

http://www.southbayriders.com/forums/showthread.php?t=10730&p=235955#post235955

The reason I have concluded is that the vBulletin software does not include the width and height data in the img information. If I disable images in Safari the link above will properly scroll to post #10.

I tried changing the code in vBulletin to include the width and height data, but that caused a problem with the Zoom function in browsers.

All other browsers besides Safari will scroll to the correct anchor even if img tags don't include the width and height data.