I noticed IB's market data (for a NYSEArca stock) constantly has the wrong Bid/Ask values, and is missing trades that actually took place (a trade which actually took place but is not reflected in the "Last Field"). I am wondering when are they going to fix this problem as you would think providing correct market data is something your average broker should be able to do. I also checked IB's market data for that particular stock against other brokers and all the other brokers have the quotes/trades correctly.
There is another thread discussing the problem. I agree with you. http://www.elitetrader.com/vb/showthread.php?s=&threadid=131412
I think we all need to write trouble tickets/call them to let them know the problem, this is unacceptable.