There are a number of civil suits mentioned in this presentation:
http://www.nafcu.org/Source/2AndrewLorentz-RegE.pdfThe problem with regulatory enforcement, these type of violations do not usually result in a C&D and therefore is not public information.
Individually, I do know banks that have had to re-work thier Reg. E claims and provide restitutions to consumers.
If you have problems and haven't been previous cited, it is because they haven't specifically looked at error resolutions.