Export Products CSV -> The error "No valid data sent"

There seems to be something wrong with the filters on the export products' form. The simple fix for this, on magento 1.7.0.2:

1. Copy the file app/code/core/Mage/ImportExport/Model/Export.php toapp/code/local/Mage/ImportExport/Model/Export.php.
2. Around line 145, on the export() method, comment out the if, and the else. There is never a filter on the form.
3. Copy the file app/code/core/Mage/ImportExport/controllers/Adminhtml/ExportController.phpto app/code/local/Mage/ImportExport/controllers/Adminhtml/ExportController.
4. Around line 77, on the exportAction() method, comment out the if and the else. Same reason as above

Hope it will help U =)