[Bug 27401] New: Britannica 2011 (11.0): Installer reports wrong amount of available space for all but the Wine folder

http://bugs.winehq.org/show_bug.cgi?id=27401

Summary: Britannica 2011 (11.0): Installer reports wrong amount
                    of available space for all but the Wine folder
           Product: Wine
           Version: 1.3.21
          Platform: x86-64
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Created an attachment (id=35040)
 --> (http://bugs.winehq.org/attachment.cgi?id=35040)
Console Log

The installer (InstallAnywhere) of Britannica 11.0 always reports a false
number as available space (2 GiB + ~ 30 MiB, not constant but always that
range) for all partitions / mount points (tested ext4 & ntfs ones) except
Wine's folder (~/.wine), which makes it impossible to proceed.