Apple Computer originally created its new Keynote software to allow its boss, Steve Jobs, to make it through speeches without a hitch. But now that the company has released the presentation program to the public, early customers say it is anything but bug-free. Some from people who say the program is the first they have used that can bring Apple’s Mac OS X operating system to its knees. “I’ve never had any OS 10 app crash the whole system before,” reads a posting from “Yikesboy.”