I've fixed the problem!

1) Use Synaptic and uninstall all scratchbox* packages

2) Remove /scratchbox directory

3) sudo vim /etc/sysctl.conf

4) Add this line: vm.mmap_min_addr = 0

5) Save and exit

6) sudo sysctl -p

That's all!

At this point just install Maemo SDK in the usual way and it will work. At least it did for me.