Hi,
I searched but couldn't find this already reported, then again you might already know as it's only a ini feature at the moment.
If you use the newish feature to change the folder tree colour in the ini file, i.e. by pasting in ...
TreeBackColor=14474460
TreeFontColor=0
... the currently selected folder isn't highlighted. Also, if you drag and drop an image from the thumbnails view to a folder in the folder tree it doesn't highlight to show what folder it's moving to. Hope that makes sense. And thanks for the 1.91.2 update by the way.
Cheers,
Simon.