I am running Gnumeric 1.10.14 on a Nokia N900 (Maemo 5). It is a must have application. I noticed that DropN900 was not synchronizing the spreadsheet files that I was editing on the phone. I save them in MS Excel (xls) for compatibility reasons. After some puzzling I realized that Gnumeric was not upgrading the date stamp of the file after modifying it when the file does exist before and is saved with the same filename.