The current color settings can become corrupted in Illustrator 9.0.2 when attempting to save the file as PDF using the Screen Optimized setting. (We have yet to confirm this behavior ourselves.) ...

For the CMYK color scheme, color specifications must be enclosed in quotation marks. For all other color schemes, the quotes are optional. You can freely intermix color-naming schemes in your programs ...

It is frustrating to have your colors changed or anything changed without you doing it. Imagine having to explain to a client that the color they now see is not what you originally had, but ...