Users of Keynote, Apple’s new presentation software that was introduced earlier this month at Macworld Expo, are complaining of a host of problems with the application, the most severe of which being reports that it is prone to crashes that can take down the entire Mac OS X operating system, reports c|net. The article said that Apple’s discussion forums are filled with reports of troubles, including “glitches printing graphics that are supposed to be translucent as well as complaints that when Keynote presentations are saved as PDF documents, the resulting files are extremely large.”