Major: 1) 'Noise' in optimal profile of standard stars (JXP -- 12feb04) 2) When there is no signal, the profile is able to float around too much (JXP -- 12feb04) It also blows up the plot range and gives 0 chi^2 (JXP -- 13feb04) 3) Why does the chi^2 decrease with wavelength? (JXP -- 15feb04) 4) Why is the red_chi^2 = 1.33 on the blue side? (JXP -- 15feb04) Minor: a) Sky subtracted image looks somewhat modelled in mike_skysub (JXP -- 12feb04) Could be the milky flat could be overfitting b) Sky blows up at red end of orders (JXP -- 12feb04) c) Brightest sky lines are 'rejected' like CR's (JXP -- 12feb04) d) Red side [old window], quite a few CR in optimal extracted data (JXP -- 12feb04) Obj to reexamine: 03apr06 -- 346-006 (#3)