I found a weird bug when using the Recolor Brush,when the hex color has at least a certain red and blue number, (for example, #4C00FD) the colors go from being a blueish purple to being a fire red, see the images below.
Thanks for the report, it looks like the value for the red color has overflown the 255 limit.
Find out how Vista icons differ from XP icons.See how RealWorld Icon Editor handles Vista icons.