I can confirm this behaviour too. It seems to apply on images that are downscaled either with CSS or the width and height attributes of img tag.
I see this for example on http://guardian.co.uk frontpage and when I zoom out with Ctrl+- almost on any page.
Mozillazine forums has a thread about the problem too: http://forums.mozillazine.org/viewtopic.php?f=9&t=1042335
I can confirm this behaviour too. It seems to apply on images that are downscaled either with CSS or the width and height attributes of img tag.
I see this for example on http:// guardian. co.uk frontpage and when I zoom out with Ctrl+- almost on any page.
Mozillazine forums has a thread about the problem too: http:// forums. mozillazine. org/viewtopic. php?f=9& t=1042335