RAINBOWDUINO V2 BUG

Hello, i’m running the pixelcontroller software with rainbowduino v2 and arduino duemilanove, and it works great. BUT…
I have just one little bug… one of my matrix led lines, on one side has permanently the green led ON, just one led of this row is OFF. They are not at full power not even medium, but its annoying to the full picture. I asked about this on the neophob forum and they told me that this is a known issue with the V2 of the rainbowduino board, and that this error differs from board to board, and that it was an entry about this on the seeedstudio wiki but now is deleted. Can anybody help me with this? is there a solution? a tweak on the board, or use a regulated power supply, or something…
thanks