Files report any read-only file as located on external media, regardless of actual location

[Sergey "Shnatsel" Davidoff]

On attempting to delete a read-only file Files report it the file is located on an external media, regardless of its actual location. A screenshot with such file in home folder is attached.

ProblemType: Bug
DistroRelease: elementary OS 0.2
Package: pantheon-files 0.1-0~r1026+pkg10~precise1 [origin: LP-PPA-elementary-os-daily]
ProcVersionSignature: Ubuntu 3.2.0-32.51-generic 3.2.30
Uname: Linux 3.2.0-32-generic x86_64
ApportVersion: 2.0.1-0ubuntu15+elementary3~precise1
Architecture: amd64
CrashDB: pantheon_files
Date: Tue Nov 20 04:15:08 2012
ExecutablePath: /usr/bin/pantheon-files
InstallationMedia: elementary OS 0.2 "Luna" - Build amd64 LIVE Binary 20121001-15:16
MarkForUpload: True
ProcEnviron:
 PATH=(custom, no user)
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: pantheon-files
UpgradeStatus: No upgrade log present (probably fresh install)

[Julián Unrrein (junrrein)]

This seems to happen only to read-only folders, not files.