Apple has updated and released a few knowledgebase articles, covering issues with iPhoto videos not working in iMovie, the keyboard and character pallets displaying when the system prompts for authentication, image resolution requirements for iPhoto books, and troubleshooting tips for wireless keyboards and mice.
This article outlines a problem where even though iPhoto can be set to import a movie and store it in locations other than the iPhoto library, if you do this movies that are kept in the iPhoto library will not show up for use in iMovie. This is because iMovie will reference the iPhoto library file for the movie contents, and if the movie is not directly in the library (even though iPhoto can reference it), iMovie will not be able to find it.
To get around this problem, either follow the article's advice and enable copying of imported items into the iPhoto library, or locate the movie file in the Finder and import it directly into iMovie.
The keyboard and character viewers will open for use with individual applications, rather than being globally on or off. As such, if you have opened one of these viewers with an authentication dialogue box open, they will open every time the system prompts for authentication. To disable them, the next time the system prompts for authentication, choose "hide" for the respective viewer in the input menu (may look like a flag on some systems).
This article discusses a problem with iPhoto and Aperture where if the resolution of an image is too low or if the caption text for an image is too large, then the program will display a warning symbol next to the picture or caption. There are a few minimum resolution requirements for iPhoto's pictures, which are outlined in this article.
This article covers a number of problems people may have with bluetooth input devices, including the device not being recognized by the computer, specific keys or other functions of the input devices not working, or bizarre jumpy or slow input. It is specific for people who use the Apple bluetooth keyboard and Magic Mouse, but may also be useful for people running other models, be them either from Apple or from a third party.