package libstdc++5 1:3.3.6-17ubuntu1 failed to install/upgrade: subprocess post-removal script returned error exit status 2

[harrykar]

Ok after some packages installation i obtain a apt-get message:

The following packages were automatically installed and are no longer required:
  libstdc++5 glest-data libcddb2 libbinio1ldbl lib32nss-mdns libaudclient1 libresid-builder0c2a libmowgli1 glest
  libsidplay2 libmcs1 libaudid3tag1
Use 'apt-get autoremove' to remove them.

After execute apt-get autoremove i obtain :

harrykar@harrysas:~$ sudo apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libstdc++5 glest-data libcddb2 libbinio1ldbl lib32nss-mdns libaudclient1 libresid-builder0c2a libmowgli1 glest
  libsidplay2 libmcs1 libaudid3tag1
The following packages will be REMOVED:
  glest glest-data lib32nss-mdns libaudclient1 libaudid3tag1 libbinio1ldbl libcddb2 libmcs1 libmowgli1 libresid-builder0c2a
  libsidplay2 libstdc++5
0 upgraded, 0 newly installed, 12 to remove and 0 not upgraded.
After this operation, 121MB disk space will be freed.
Do you want to continue [Y/n]? Y
(Reading database ... 204155 files and directories currently installed.)
Removing glest ...
Removing glest-data ...
Removing lib32nss-mdns ...
Removing libaudclient1 ...
Removing libaudid3tag1 ...
Removing libbinio1ldbl ...
Removing libcddb2 ...
Removing libmcs1 ...
Removing libmowgli1 ...
Removing libresid-builder0c2a ...
Removing libsidplay2 ...
Removing libstdc++5 ...
dpkg (subprocess): unable to execute post-removal script: Exec format error
dpkg: error processing libstdc++5 (--remove):
 subprocess post-removal script returned error exit status 2
Processing triggers for man-db ...
Processing triggers for menu ...
Processing triggers for libc6 ...
ldconfig deferred processing now taking place
/sbin/ldconfig.real: File /usr/lib/libcurl.so.4.1.0 is empty, not checked.
/sbin/ldconfig.real: File /usr/lib/libcurl.so.4 is empty, not checked.
/sbin/ldconfig.real: File /usr/lib/libcurl.so.3 is empty, not checked.
Errors were encountered while processing:
 libstdc++5
E: Sub-process /usr/bin/dpkg returned an error code (1)

that's all i can say. What's wrong?
TIA

ProblemType: Package
Architecture: amd64
Dependencies:
 libgcc1 1:4.3.3-5ubuntu4
 gcc-4.3-base 4.3.3-5ubuntu4
 findutils 4.4.0-2ubuntu4
 libc6 2.9-4ubuntu6
DistroRelease: Ubuntu 9.04
ErrorMessage: subprocess post-removal script returned error exit status 2
NonfreeKernelModules: nvidia
Package: libstdc++5 1:3.3.6-17ubuntu1
SourcePackage: gcc-3.3
Title: package libstdc++5 1:3.3.6-17ubuntu1 failed to install/upgrade: subprocess post-removal script returned error exit status 2
Uname: Linux 2.6.28-14-generic x86_64