On ubuntuforums.org (http://ubuntuforums.org/showthread.php?p=3109273) I've found the solution to fix the problem between Openoffice and Slickness black theme made from Robert.
This fix requires that you have also installed Slickness theme following Robert instructions, for a better integration with slickness black theme.
To install the fix simply follow this instructions(based on Ubuntu):
open the terminal and cd in folder where you have placed the file just downloaded, then:
1) sudo mv /usr/lib/openoffice/program/ooqstart /usr/lib/openoffice/program/ooqstartBIN
2) sudo cp ooqstart /usr/lib/openoffice/program
3) sudo chmod +x /usr/lib/openoffice/program/ooqstart
And here it is!
For any question ask me!
P.S: this fix can be used also with other dark themes, just modifying ooqstart file, ask me if you need using this fix with other themes..
Thanks to Ubuntuforums.org and Robert Slickness themes..
Link to Ubuntuforums:(http://ubuntuforums.org/showthread.php?p=3109273)
Link to Slickness theme (http://www.gnome-look.org/content/show.php/SlicknesS?content=71993)
Link to Slickness black theme (http://www.gnome-look.org/content/show.php/Slickness+Black?content=73210)