Due to the limitations of HTML or differences in display capabilities of different browsers, this version may differ slightly from the official printed version. (pabulletin.com)
At the same time, in many disciplines the mediocre PDF display capabilities, small screen, and lack of color do have the ability to hinder the eReader's usefulness. (ereadertech.com)
While that site appears to be down at the moment, when it was properly operational, it contained a handy grid displaying the capabilities of the various devices. (epubsecrets.com)