This was expected, as the Aperture Compatibility Checker program also specifies that there is an absolute requirement for a minimum screen size of 1280x780. This is of course completely arbitrary, considering that if one applies the Screen Spanning Doctor to the iBook and attaches an external screen, Aperture 1.1 will launch just fine, with a minimum size of 1000x685, well within the resolution limits of the iBook's built-in screen. Furthermore, if one unplugs the external screen, Aperture 1.1 continues to work fine. Curiously, when I ran this experiment, the external screen I attached was 1360x768, which just like the iBook's 1024x768, doesn't meet the minimum 780 vertical resolution.
Even more curious is the fact that if one uses a resolution of just 640x480 on the external screen, Aperture will still load normally. Perhaps that makes sense though, as 1024x768 + 640x480 = 1093632 which is greater than 1280x780 = 998400.
Hopefully, somebody will be able to patch Aperture 1.1 to remove this arbitrary limitation. Or, perhaps Apple will finally release that 13" 1280x800 widescreen Core Duo MacBook Pro with Blu-ray drive. ;)