Id' say all of the antipatterns covered in the book are actually the most common. However, I'd say the most common among those are the ones pertaining to messy views. Its very common for developers (and designers since they work in the views) to keep things very messy in the views because its so unstructured and a mix of different languages.
thanks,
-Chad
Humans and their filthy friendship brings nothing but trouble. My only solace is this tiny ad: