No manual entries for basic commands like cp or mv

I'm using OpenMandriva Lx 4.0 for a few weeks now and all in all it works very well on my small Netbook. Recently I've noticed that for some commands e.g. cp or mv there is no manual entry found on my system or it can't be found, but for other commands like netstat it will be displayed. I've checked that the packages man-db and man-pages are installed and also tried to reinstall them. In another post there was suggested to try mandb -c which yields to the following output updating index cache for path `/usr/share/man/man7'. Wait... Processing manual pages under /usr/share/man... Updating index cache for path `/usr/share/man/man5'. Wait... mandb: can't open /usr/share/man/man5/regulatory.bin.5.gz: No such file or directory mandb: warning: /usr/share/man/man5/regulatory.db.5.xz: bad symlink or ROFF `.so' request Updating index cache for path `/usr/share/man/man9'. Wait... mandb: can't open /usr/share/man/:man9/skb_queue_head.9: No such file or directory mandb: warning: /usr/share/man/man9/__skb_queue_head.9.xz: bad symlink or ROFF `.so' request mandb: can't open /usr/share/man/:man9/skb_queue_tail.9: No such file or directory mandb: warning: /usr/share/man/man9/__skb_queue_tail.9.xz: bad symlink or ROFF `.so' request Updating index cache for path `/usr/share/man/man1'. Wait... mandb: warning: /usr/share/man/man1/openssl-rand.1ssl.xz is a dangling symlink mandb: warning: /usr/share/man/man1/openssl-passwd.1ssl.xz is a dangling symlink Updating index cache for path `/usr/share/man/man4'. Wait... Updating index cache for path `/usr/share/man/man6'. Wait... Updating index cache for path `/usr/share/man/man2'. Wait... mandb: can't open /usr/share/man/man2/init_module.2: No such file or directory mandb: warning: /usr/share/man/man2/finit_module.2.xz: bad symlink or ROFF `.so' request Updating index cache for path `/usr/share/man/mann'. Wait... Updating index cache for path `/usr/share/man/man2x'. Wait... Updating index cache for path `/usr/share/man/man8x'. Wait... Updating index cache for path `/usr/share/man/man3'. Wait... mandb: warning: /usr/share/man/man3/Class::Prototyped::why.3pm.xz: whatis parse for Class::Prototyped::why(3pm) failed mandb: warning: /usr/share/man/man3/MIME::changes.3pm.xz: whatis parse for MIME::changes(3pm) failed mandb: warning: /usr/share/man/man3/XML::Validator::Schema::SimpleType.3pm.xz: whatis parse for XML::Validator::Schema::SimpleType(3pm) failed Updating index cache for path `/usr/share/man/man5x'. Wait... Updating index cache for path `/usr/share/man/man3p'. Wait... Updating index cache for path `/usr/share/man/man8'. Wait... mandb: can't open /usr/share/man/man8/setarch.8: No such file or directory mandb: warning: /usr/share/man/man8/uname26.8.xz: bad symlink or ROFF `.so' request mandb: can't open /usr/share/man/man8/setarch.8: No such file or directory mandb: warning: /usr/share/man/man8/x86_64.8.xz: bad symlink or ROFF `.so' request mandb: can't open /usr/share/man/man8/setarch.8: No such file or directory mandb: warning: /usr/share/man/man8/i386.8.xz: bad symlink or ROFF `.so' request mandb: can't open /usr/share/man/man8/setarch.8: No such file or directory mandb: warning: /usr/share/man/man8/linux32.8.xz: bad symlink or ROFF `.so' request mandb: can't open /usr/share/man/man8/setarch.8: No such file or directory mandb: warning: /usr/share/man/man8/linux64.8.xz: bad symlink or ROFF `.so' request mandb: warning: /usr/share/man/man8/pcimodules.man.xz: ignoring bogus filename mandb: warning: /usr/share/man/man8/saslauthd.8.xz: whatis parse for saslauthd(8) failed Updating index cache for path `/usr/share/man/man4x'. Wait... Updating index cache for path `/usr/share/man/man1x'. Wait... Updating index cache for path `/usr/share/man/man3x'. Wait... Updating index cache for path `/usr/share/man/man1p'. Wait... Updating index cache for path `/usr/share/man/man6x'. Wait... Updating index cache for path `/usr/share/man/man0p'. Wait... Updating index cache for path `/usr/share/man/man7x'. Wait... Updating index cache for path `/usr/share/man/man9x'. Wait... done. Checking for stray cats under /usr/share/man... Checking for stray cats under /var/cache/man... ... However I'm not shure how to proceed in order to get the man pages configured properly. Does anyone has an idea how to fix it?