I just installed OI Safe and OI Notepad (along with some other stuff like Shopping List and File Manager).
I created a test note and encrypted it. I opened it a few times and added some notes each time. Sometimes, when I re-opened it, the previous change was not saved. I may not be saving the notes or exiting properly. I have OI Safe set to lock in 1 minute (I assume that's 1 minute of idle). I'm trying to narrow down when I actually lose information but it doesn't seem to be consistent.
Right now I just added some comments to an existing note. While still on the note screen I hit the Home button. I got the error message:
The application OI Notepad (process org.openintents.notepad) has stopped unexpectedly. Please try again.
I went back into the note and the text I added at the bottom was gone.
I'm running on a Droid with Android 2.0.1. OI Safe is version 1.2.4 and OI Notepad is 1.2.1. I think these are the latest from the Market.