None of the CFL's have a continuous spectrum like an incandescent. The color values of an object depend on the integrated reflectivity over the spectrum, so there will inevitably be differences in color appearance among objects which appear the same color in natural light, which of course is incandescent. There are "holes" in the CFL spectra, and these will match up differently with the reflectivity spectra of various objects.
Sure. But there are ways to lessen the problems of perceived color. They won't be a perfect match, but perhaps enough to solve "mimaw"'s problem. I read a LOT, all of it by CFL light. No problems. But I "did" take the time to order CFL's with a spectral range more similar to incandescents that what is normally found in the local hardware store.
Fortunately, I'm not bothered by the 60 Hz "flicker". For THAT, there is no cure other than not using CFL's (or regular tube fluorescents, for that matter).