Björn, in answer to your question: all versions of OpenOffice preinstalled by default with Ubuntu 10.10, 10.04, 9.10, etc. did not have this bug. I know this for a fact because I regularly use a spreadsheet with array formulas using the PRODUCT function that has worked fine with the default OpenOffice installation in all versions of Ubuntu released over the past five-plus years.
Björn, in answer to your question: all versions of OpenOffice preinstalled by default with Ubuntu 10.10, 10.04, 9.10, etc. did not have this bug. I know this for a fact because I regularly use a spreadsheet with array formulas using the PRODUCT function that has worked fine with the default OpenOffice installation in all versions of Ubuntu released over the past five-plus years.