Automatic Word Completion Problems with OpenOffice.org

I was having problems with the word completion while working on the translation of a large manual. I thought it was a problem that the word completion was not working properly, so I searched for how to switch it off... and this is what I found:

How do you turn off the automatic word completion behavior?

1. Open a text document.
2. From the pulldown menus, select Tools > AutoCorrect Options.
3. Select the Word Completion tab.
4. Deselect the check box to the left of "Enable word completion".
5. Click OK.

1. For OpenOffice.org 3.2, open a text document.
2. From the pulldown menus, select Format > AutoCorrect > AutoCorrect Options.
3. Select the Word Completion tab.
4. Deselect the check box to the left of "Enable word completion".
5. Click OK. 

(from: http://wiki.services.openoffice.org/wiki/Documentation/FAQ/Writer/AutomaticFunctions/How_do_I_turn_off_automatic_word_completion%3F )

When I went to the settings, before turning it off, I decided to try deleting all the previous entries... they were several thousands I guess.

After deleting them, now is working much better, remembering new entries, thus guessing well and not giving me wrong guesses, that cause misspellings.