Could you expand on what you mean by 'tweak'?
Sure thing - Most noted problems were/are high noise in full auto pictures due to the camera's bias towards fastest shutter speed possible. Though correct in theory, a camera should have equally high-quality high ISO capability before the program defaults to such a high ISO - this is not the case with the G9. To correct the problem, users use the camera in manual mode and either slow the shutter speed down so they can lower the ISO or, use more flash compensation or, tediously 'expose to the right' - meaning, they will increase the exposure to the point right before the highlights start to blow decreasing the visible noise.
Other problems - If you buy the add-on lens adapter and either of the add-on lenses, you'll be forced to buy a shoe-mount flash because the add-on adapter and lenses BLOCK the built-in flash so you get nice half-circle shaped dark areas in all your photos.
In general, images shot in full-auto are not impressive at all, though manually controlled images are nice.
Considering the cost of the camera, plus the add-ons and the fact it performs best in manual-mode, you're simply just better off buying a DSLR. A) most DSLRs are better in full-auto mode than the G9 and B) are a LOT better in manual mode than the G9 and C) The 'extras' or 'add-ons' like flash and lenses etc, cost the same for the DSLR as the G9 but you'll get far more bang for your buck out of a DSLR kit.. I promise you that! At the risk of sounding like a Pentax spokesperson, take a look at the K100D-Super or K10D - both offer in-body Image Stabilization (SR) so every single lens you put on it has IS or, one of the Canon or Nikon offerings - though no in-body IS with them.. I think in Canon it would be the XTi and in Nikon the D40x..
