Sorted:

problem about nswindow-Collection of common programming errors

problem about tframe-Collection of common programming errors

Work around for being unable to make function templates virtual?-Collection of common programming errors

Using Haskell's types to replace assert statements or if checks in other languages-Collection of common programming errors

problem about duck-typing-Collection of common programming errors

Using Reflection.Emit to copy a custom attribute to another method-Collection of common programming errors

Objective C – Weak reference to super class?-Collection of common programming errors

problem about implicit-conversion-Collection of common programming errors

Thread safety using OCXs from C# .NET-Collection of common programming errors

Static Binding and Dynamic Binding-Collection of common programming errors