I am having problems with image quality when reducing images or zooming out in certain applications. It looks almost as if the image is not being smoothed or anti-aliased.
On the left is gthumb/eog (look the same) - on the right is gimp. Left one is clearly broken. It never used to be like that. Those are at 20% zoom: they're identical full size. [EDIT: Actually they don't but the difference is minor; left is still worse.]
Eye of Gnome (EoG) and GThumb both suffer from it when resizing to reduce, and when zooming out to reduce, but oddly Gthumb doesn't suffer when generating thumbnails. Shotwell and Gimp are unaffected. Libre Office is affected.
Given this, I wonder if anyone might know which component(s?)/issues are the cause? I'm on a 64 bit precise with NVidia 8800 GTX (nouveau).
EDIT: Additional information. If i use the tools dropdown button in the top toolbar of Gthumb, it reduces images size and retains full quality. If I instead click the paint palette at the top right to enter Edit Mode, and resize from in there, it loses quality. The "high quality" check box makes a difference but not significantly. The zoom also loses quality. I am wondering if perhaps it doesn't have 2 rendering modes and 1 is broken?
EDIT 05May2012: I have since discovered that
(a) The image quality for EoG and Gthumb suffered its regression in Oneiric (Maverick, Natty work fine).
(b) It is not limited to Ubuntu, it also affected Fedora 16.
So I'll take as an accepted answer anyone who can either fix that or advise me how to go bug reporting this. I don't really know which packages to apply it to, or whether it needs to go to Ubuntu or Gnome. Thanks!