OK this seems to be fixed in RC7 I got confused about the versions sorry. So now this can be moved to 'Closed/Solved' for sure.
If you still have this bug, go to download latest RC7 release.
RC6 - Don't remember the layout
Moderators: helmut, XnTriq, xnview
XnView Tweak UI - Tool to customize your XnView beyond the regular XnView options.
UI-less Settings - Documentation of all the hidden settings in XnView.
XFAM - Tool to create and customize XnView file associations.
UI-less Settings - Documentation of all the hidden settings in XnView.
XFAM - Tool to create and customize XnView file associations.