It would be very useful if Reflector indicated if the Assembly was delay signed (see example below) in the bottom window that displays when you select an assembly
// Assembly mscorlib, Version 2.0.0.0
Location: %SystemRoot%\Microsoft.net\Framework\v2.0.50727\mscorlib.dll
Name: mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 (Delay Signed)
Type: Library
// Assembly mscorlib, Version 2.0.0.0
Location: %SystemRoot%\Microsoft.net\Framework\v2.0.50727\mscorlib.dll
Name: mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 (Delay Signed)
Type: Library