I've had massive openbook failure for months through IB. It'll quote only the top or will give a "swiss cheese" look at openbook...only about 20-70% of the total book shows up.
It seems to be less of a problem with the more liquid NYSE stocks (or not as readily apparent). All the illiquid quotes for me have been a mess since the beginning of the year. I can't figure out why some work.....and others don't. NYSE or IB problem???????