Its fixed, its fixed! Thanks to Arno Bosse on the Apple Discussions forums and ultimately the MacFixIt posting for the solution to this problem.
To recap: a number of people could not use the new Web View feature of Keynote 2. The simple solution is to delete com.apple.internetconfig.plist from ~/Library/Preferences. Deleting this file does not seem to have any other ill effects. Someone earlier suggested deleting a different plist file, but that did not work. This did!
I can now use the Web View feature on my G5 without switching to a "clean" user account. Thanks a bunch!
