So, it appears the problem is that OpenOffice still has all the brand recognition, while LibreOffice suffers from a lack of awareness. The chances are slim to none that LibreOffice will ever be able adopt the OpenOffice trademark.

I think the LibreOffice project should use this opportunity to rebrand themselves and build even more distance from OpenOffice and MS Office. Pick a name that's easier to pronounce, spell, and remember - simple English words without two vowels in a row. (What was that? Did you say Leebray Office? Libruh Office? Lib Roffice? Does this have something to do with Mexicans and liberals? We're capitalists here!)

Everyone who cares about "libre" software will still know it's libre without putting it in the name. Communicate that this is the office suite that successful people use, not the one that poor people use because they're poor.