Windows Version: XP SP2 (Build 2600)
I think you guys are probably already aware of this, but I thought I'd chime in. Basically any directory or file containing asian characters (Japanese, Chinese, Korean, etc.) is unreadable by XnView. I'm not sure how complicated it is to have this supported, but it would be very much appreciated.
Also - and this is a really small issue - traditionally (at least with all/most Windows programs) the "Info" menu you have in XnView has always been called the "Help" menu. It always looks odd to me when I see it. Maybe that's just me though.

Anyways, continued success! This is still the best image-viewing program around!
Cheers,
Criftus