i finally noticed the backup.metadata file did not have the little 'pin' icon and figured the file was corrupted somehow. i created a new backup (of the empty n800), then copied the new metadata file over the apparently corrupted one. the backup/restore program then 'saw' the old file and was able to do a partial restore. fortunately it restored my gpe calendar dates, but unfortunately it was not able to restore the data for email or gpe contact. if anyone has a better idea on repairing a broken backup i'd be glad to see it.

john