Bailey says that free banking both misleads customers about how they are really paying for banking services, and also means that banks themselves may not properly understand the costs of the products and services they supply.

BBC: Free banking 'a dangerous myth'

Similarly, queries and complaints being directed through that broker may not be properly communicated (if at all).

FORBES: Se Habla Espanol and No Finding of Misconduct in Chase / LPL Arbitration

Some complex files created in Windows may not translate properly to the Mac.

WSJ: Mossberg's Mailbox: A New View on Windows