I can't speak for SoCal Pubbie but I have nary a clue. What is the difference and what has happened in that regard in the Zimmerman trial?
The Defense wanted to depose the Martin family attorney. The judge ruled for the State and refused to allow it, the Defense took an interlocutory appeal and the Appeals court allowed it.
Interlocutory appeals are taken before the case has been decided, they usually involve discretionary matter such as this.
Many here assume bias as it is commonly understood is the same thing as judicial bias. It is not.
What appears to be bias to the average person in this case does not rise anywhere close to the standard of judicial bias that could be grounds for an appeal.