File pane view which shows detailed info about files as list, including their name, size, modified date, etc.

The path toolbar text field or pathbar breadcrumb control found in the toolbar

Related to Error/Warning/Critical/etc. messages which are displayed via console

Related to the menubar or context menu

Issues related to different file types and default applications for them

Not cat

Related to mounting/unmounting without gvfs

Network icon in the side pane

Ghost files, missing files. Thunar does not show reality

Extension that provides additional pages for the file properties dialog

Extension that allows user defined actions to appear in the context menu

Extension to add a "Mail Recipient" entry to the "Send To" sub menu of the context menu

Xfce panel extension to add a trash can

Plugin to set an image as the desktop wallpaper through the context menu

The dialog that appears when right-clicking a file, then Properties...

Scrollbars and mouse scroll