I am using BackTrack 5 R3 Virtual Machine in VirtualBox.
Recently, when I was updating BackTrack (by using the command "apt-get update && apt-get upgrade && apt-get dist-upgrade"), I had to forcibly power off the VM. The updates were being installed at that time.
Now, when I try to update, I am getting the following error.

root@bt:~# apt-get update && apt-get upgrade && apt-get dist-upgrade
Hit http://all.repository.backtrack-linux.org revolution Release.gpg           
Hit http://32.repository.backtrack-linux.org revolution Release.gpg            
Hit http://updates.repository.backtrack-linux.org revolution Release.gpg
Ign http://all.repository.backtrack-linux.org/ revolution/main Translation-en_US
Ign http://32.repository.backtrack-linux.org/ revolution/main Translation-en_US
Ign http://updates.repository.backtrack-linux.org/ revolution/main Translation-en_US
Ign http://all.repository.backtrack-linux.org/ revolution/microverse Translation-en_US
Ign http://32.repository.backtrack-linux.org/ revolution/microverse Translation-en_US
Ign http://updates.repository.backtrack-linux.org/ revolution/microverse Translation-en_US
Ign http://all.repository.backtrack-linux.org/ revolution/non-free Translation-en_US
Ign http://32.repository.backtrack-linux.org/ revolution/non-free Translation-en_US
Ign http://updates.repository.backtrack-linux.org/ revolution/non-free Translation-en_US
Ign http://all.repository.backtrack-linux.org/ revolution/testing Translation-en_US
Ign http://32.repository.backtrack-linux.org/ revolution/testing Translation-en_US
Ign http://updates.repository.backtrack-linux.org/ revolution/testing Translation-en_US
Hit http://all.repository.backtrack-linux.org revolution Release
Hit http://32.repository.backtrack-linux.org revolution Release
Hit http://updates.repository.backtrack-linux.org revolution Release 
Hit http://all.repository.backtrack-linux.org revolution/main Packages
Hit http://32.repository.backtrack-linux.org revolution/main Packages
Hit http://updates.repository.backtrack-linux.org revolution/main Packages
Hit http://all.repository.backtrack-linux.org revolution/microverse Packages
Hit http://32.repository.backtrack-linux.org revolution/microverse Packages
Hit http://updates.repository.backtrack-linux.org revolution/microverse Packages
Hit http://all.repository.backtrack-linux.org revolution/non-free Packages
Hit http://32.repository.backtrack-linux.org revolution/non-free Packages
Hit http://updates.repository.backtrack-linux.org revolution/non-free Packages
Hit http://all.repository.backtrack-linux.org revolution/testing Packages
Hit http://32.repository.backtrack-linux.org revolution/testing Packages
Hit http://updates.repository.backtrack-linux.org revolution/testing Packages
Reading package lists... Done
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0B of additional disk space will be used.
Do you want to continue [Y/n]? y
Setting up w3af (1.2-bt2) ...
tar: pybloomfiltermmap-0.2.0.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
tar: Child returned status 2
tar: Exiting with failure status due to previous errors
/var/lib/dpkg/info/w3af.postinst: line 4: cd: pybloomfiltermmap-0.2.0: No such file or directory
python: can't open file 'setup.py': [Errno 2] No such file or directory
svn: Working copy 'w3af' locked
svn: run 'svn cleanup' to remove locks (type 'svn help cleanup' for details)
dpkg: error processing w3af (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)
Somebody please help..
I dont want to loose the latest updates..
Thank You..