Apport fails to submit crash file

Binary package hint: apport

ubuntu-bug crashfile (attached in bug #688260) ended with crash:

Traceback (most recent call last):
  File "/usr/share/apport/apport-gtk", line 353, in <module>
    app.run_argv()
  File "/usr/lib/python2.7/dist-packages/apport/ui.py", line 571, in run_argv
    self.run_crash(self.options.crash_file, False)
  File "/usr/lib/python2.7/dist-packages/apport/ui.py", line 290, in run_crash
    response = self.ui_present_report_details(False)
  File "/usr/share/apport/apport-gtk", line 152, in ui_present_report_details
    self.format_filesize(self.get_complete_size()))
  File "/usr/lib/python2.7/dist-packages/apport/ui.py", line 703, in format_filesize
    return locale.format('%.1f MiB', size / 1048576.)
  File "/usr/lib/python2.7/locale.py", line 189, in format
    "format specifier, %s not valid") % repr(percent))
ValueError: format() must be given exactly one %char format specifier, '%.1f MiB' not valid

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: apport 1.16-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.37-7.19-generic 2.6.37-rc3
Uname: Linux 2.6.37-7-generic x86_64
NonfreeKernelModules: fglrx
ApportLog:
 apport (pid 5090) Sun Dec 12 12:04:08 2010: called for pid 4997, signal 11
 apport (pid 5090) Sun Dec 12 12:04:08 2010: executable: /usr/bin/empathy (command line "empathy")
 apport (pid 5090) Sun Dec 12 12:04:13 2010: wrote report /var/crash/_usr_bin_empathy.1000.crash
Architecture: amd64
CrashReports: 600:1000:1000:3598960:2010-12-12 12:05:30.706190000 +0100:2010-12-12 12:05:31.706190000 +0100:/var/crash/_usr_bin_empathy.1000.crash
Date: Sun Dec 12 12:09:34 2010
PackageArchitecture: all
ProcEnviron:
 SHELL=/bin/bash
 LANG=sk_SK.UTF-8
SourcePackage: apport