When a custom dpi is set in the the font tab of Appearances dialog

Anything related to the desktop bus interface

Removable and non-removable disk partitions, drives, etc.

Other dialogs from the preferences, file properties and bulk renamer dialogs

Issues related to holding down a mouse key while moving the mouse pointer

Any type of file rearrangement like sorting and filtering

Highlight mode. Files which have a custom background or text color

Operations like copy, cut, paste, move, and delete (includes copy/move dialog)

'GNOME Virtual file system' backend to work with the I/O abstraction of GIO

Related to mounting/unmounting with gvfs

Browsing history, controlled with back and forward buttons

Issues related to icon presentation, scaling and similar

File pane view which shows the icon or thumbnail and name of files

Embedded or standalone image preview

Related to shortcut keys and accelerators