In ERP 6.0 system to Ehp 5.0. When you save the files as spreadsheets. "System -> List -> Save -> Local File and select "Spreadsheet" the default extension for the file now comes
up as ".txt". The default extension before the upgrade was ".XLS". This happens in all systems that have been upgraded to the SAP EHP2 SAP
Please review the following attached Notes which explain in more detail why this change was made.
975868 - Conversions when downloading spreadsheets
569537 - Incorrect data during import into Excel
The note 975868 explains the reason for this change of behaviour.