Ummm, someone else may have said this, but I don't think I said a ferricyanide bleach was ok. I said it was no longer used at EK for testing films, so I didn't know if it was acceptable.

Dichromate is similar to ferricyanide. It was once used as a color film bleach and is no longer tested with color films at EK. So, if the films are untested, the bleach may work, but you are on your own regarding dye stability, dye destruction or hue changes. Even the formation of a dye-metal complex can cause problems.