Hey, Murat!
I have few issues with Rescan Folders.. feature.
I have this folder structure:
Test folder -> Folder 1 -> subfolder 1-1 -> 2 image files
-> subfolder 1-2 -> 2 image files
-> 2 image files
-> Folder 2 -> subfolder 2-1 -> 2 image files
-> subfolder 2-2 -> 2 image files
-> 2 image files
-> Folder 3 -> 2 image files
So, if I'll move subfolder 2-2 from "Folder 2" to the "Test folder" and use "rescan folders..." feature, I'll still see subfolder 2-2 in the "Test folder", as it should be, but also I'll see the (empty, with 0 images) subfolder 2-2 in the Folder 2 in the "Folders" tag section.
If I'll move "Folder 3" into the "Folder 1" and use Rescan Folder feature, I'll see Folder 3 in the Folder 1 as it should be, but also I'll still have Folder 3 (empty) in the Test folder.
This works with removing too - if I'll remove folder, I'll still see it in the Folder tag section after rescanning.
Also I had issue with duplicated tagged images (I had 2 equal images in one category after rescanning), but I can't repeat it unfortunately =(