thanks for your help michaaa62
seems to have worked but now I have this problem:

Setting up libboost-system1.42.0 (1.42.0-3maemo3) ...
Optifying usr/share/doc/libboost-system1.42.0 -> /opt/maemo/usr/share/doc/libboost-system1.42.0
mv: cannot rename '/usr/share/doc/libboost-system1.42.0': No such file or directory
dpkg: error processing libboost-system1.42.0 (--configure):
subprocess post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of libboost-filesystem1.42.0:
libboost-filesystem1.42.0 depends on libboost-system1.42.0 (>= 1.42.0-1); however:
Package libboost-system1.42.0 is not configured yet.
dpkg: error processing libboost-filesystem1.42.0 (--configure):
dependency problems - leaving unconfigured
Setting up libboost-iostreams1.42.0 (1.42.0-3maemo3) ...
Optifying usr/share/doc/libboost-iostreams1.42.0 -> /opt/maemo/usr/share/doc/libboost-iostreams1.42.0
mv: cannot rename '/usr/share/doc/libboost-iostreams1.42.0': No such file or directory
dpkg: error processing libboost-iostreams1.42.0 (--configure):
subprocess post-installation script returned error exit status 1
Setting up libboost-regex1.42.0 (1.42.0-3maemo3) ...
Optifying usr/share/doc/libboost-regex1.42.0 -> /opt/maemo/usr/share/doc/libboost-regex1.42.0
mv: cannot rename '/usr/share/doc/libboost-regex1.42.0': No such file or directory
dpkg: error processing libboost-regex1.42.0 (--configure):
subprocess post-installation script returned error exit status 1
Setting up libboost-thread1.42.0 (1.42.0-3maemo3) ...
Optifying usr/share/doc/libboost-thread1.42.0 -> /opt/maemo/usr/share/doc/libboost-thread1.42.0
mv: cannot rename '/usr/share/doc/libboost-thread1.42.0': No such file or directory
dpkg: error processing libboost-thread1.42.0 (--configure):
subprocess post-installation script returned error exit status 1
Setting up opera-mobile (11.5beta1-10~fremantle0) ...
Errors were encountered while processing:
libboost-system1.42.0
libboost-filesystem1.42.0
libboost-iostreams1.42.0
libboost-regex1.42.0
libboost-thread1.42.0
E: Sub-process /usr/bin/dpkg returned an error code (1)v

any code to fix this one? I'd like to avoid a reflash. did it yesterday and two days in a row is tooo much...
thanks.