Export of Contact, Accounts and Opportunities has stopped working in th elatest release. If I select certain records, or all the records on the page, the csv file that is created is empty. If I select all records it works. Any ideas anyone?

Linux 2.4.27-3-386
SugarCRM: 5.0.0b
Apache/2.2.3
2.4.4 PHP/
mysql: 5.0.30