In some circumstanses the properties of the first image listed are missing in browse mode.
To reproduce this:
-Open an image with XnView (i.e. double click in Windows Exporer)
-Go to browse mode in XnView (by pressing Enter or clicking Browse on the toolbar)
-And the first image listed has no properties! (Neither is the line for that image colored, so it appears that the program thinks it is not an image).
Refreshing will however always correct this

Regards,
Lostclown