Oinak questions

Oinak answers

• Remove unncessary error raised by paperclip - filename is not recognized by the 'identify' command
• Putting update logic in your migrations
• Reduce Mongrel Rails Memory Footprint & Increase performance?
• Reusing named_scope to define another named_scope
• ActiveRecord#exists? or rescue from ActiveRecord::RecordNotFound
• Ruby Time.parse gives me out of range error