Sorted:

Refactoring a static class to separate its interface from implementation-Collection of common programming errors

How many types is too many for an object?-Collection of common programming errors

Interfacing common functionality between controls-Collection of common programming errors

Haskell: Custom types with conditions-Collection of common programming errors

Methods in super that will be subclassed anyway (Cocoa)-Collection of common programming errors

Change constants defined in interface-Collection of common programming errors

How can one manually create an Apache request object?-Collection of common programming errors

How to build interface for such enum-Collection of common programming errors

Create vector of all classes implementing an interface-Collection of common programming errors

How do I force a polymorphic call to the super method?-Collection of common programming errors