Finder

The Finder is the Mac OS X desktop, FTP client and network file manager - the Dock is a separate application that plays by its own rules.

Quoting Jonathan Rentzsch on fixing it:

And by “fix”, I mean transmogrify Finder X’s source code into a soul, transfer the pneuma to a goat for purposes of physical manifestation, place said goat on top three feet of logs, twigs, shaved wood and dried leaves. Add copious and irresponsible amounts of accelerant and ignite. It’s sad a goat must die, but it’s the only method that ensures Finder X stays dead.

• Dragging files from the iTunes library to an SMB-mounted filesystem will fail after four to five sets of files are copied - i.e., the column pane will light up as a drop target, but the files won’t be copied across. Forcing a Finder relaunch re-enables copying, which should mean it isn’t an iTunes issue. (Filed as #4225480)

• Folders with a colon (:) in their names are displayed with a forward slash / instead. (Filed as #4581709, which was considered “normal behaviour” - quote: “Please note that Finder presents the ‘Carbon filesystem’ view, regardless of the underlying filesystem.”)