in the file upload dialog the name of the last uploaded file is showing as default. This is confusing because the upload dialog is used in different contexts and the previous file usually has nothing to do with the current task.
I would prefer if only the last directory will be selected and the file name should be left empty.
With the download dialog I think its ok, when the last filename is shown, if no explicit file name is passed to the dialog.
you can use the FILENAME in order to specify specific filenames, then the name is controlled from the server side. I would "always" propose to do this, because the extension of the file should be controlled from the server side program...
Regards, Björn
PS: we are a bit afraid of changing the default behaviour of the current system, others may think differently about it... ;-)