I noticed that an explicit interface implementation is shown as 'private' (small lock on icon) in File Structure window. Possibly, R# mistakenly recognizes it as 'private' because there is no 'public' keyword in method's header. But an explicit interface implementation is public by default, so compiler doesn't require (and really doesn't allow) 'public' keyword in it. So, it's a bug, isn't it?
OS Name: Microsoft Windows XP Professional
OS Version: 5.1.2600 Service Pack 2 Build 2600
VS 2005 version 8.0.50727.51
R# build 251