Hey Guys,

I am unable to install/update any app.
HAM tells me I have not enough space available and need to uninstall some apps first...
How comes?
I have 100+ MB free in /home and 24 MB free in rootfs!

Any tips what the problem might be?

in console do an
apt-get autoclean

and

apt-get autoremove

that will remove all your cached packages and free up rootfs' space

That is insufficient rootfs space.

The first thing to do is to close repositories you don't need.

There are some useful tips in this thread

http://talk.maemo.org/showthread.php?t=40307

Thanks a lot for your help!

But still the same problem...

Here is the output from xTerm:

Nokia-N900:~# apt-get autoclean
Reading package lists... Done
Building dependency tree
Reading state information... Done
Nokia-N900:~# apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 6 not upgraded.
2 not fully installed or removed.
After this operation, 0B of additional disk space will be used.
Setting up libsmpeg0 (0.4.5+cvs20030824-2.3-0maemo1) ...
Optifying usr/share/doc/libsmpeg0 -> /opt/maemo/usr/share/doc/libsmpeg0
mv: cannot rename '/usr/share/doc/libsmpeg0': No such file or directory
dpkg: error processing libsmpeg0 (--configure):
subprocess post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of python-pygame:
python-pygame depends on libsmpeg0; however:
Package libsmpeg0 is not configured yet.
dpkg: error processing python-pygame (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
libsmpeg0
python-pygame
E: Sub-process /usr/bin/dpkg returned an error code (1)

Also deactivated testing and devel...

It actually seems that it is a faulty package that was not fully installed that is blocking new installs
Try this :

After you get that error, try apt-get -f install to force an install of the files that didn't get loaded because of the error.
Then try apt-get upgrade again, apt-get -f install back and forth until only the package the error is gone.

I don't know why but I had missing gcc4.4 while I tried to download apps from reposity, so I downloaded that from http://n900.tannerlab.com/ and installed that from console, check last tab when you try to download an app and check if that has missing libs, also check if you don't have custom uploaded files to /root/ folder