I did rarely use these keys in previous versions, except when saving a note before rebooting the tablet. Therefore I did remove them. Though I see that accidentially deleting text might be more of a problem on a N810 than on my N800, due to the hardware keyboard.

I will check, how I can re-add some sort of locking functionality in the next version. Maybe just one button for toggling between locked and unlocked.

Sending applets into the backround means starting an application and thereby hiding the desktop. So you don't have to send an applet into the background. It's happening automatically.

And "closing the applet" also means rebooting or shutting down the device.

So the current auto-saving is covering pretty much every case where you could loose data, except an unexpected crash.

And anyway if you want to, you can still save a note manually, by switching to another note via right or left arrow button. It's doing the same thing as the save button did before (except locking the note).

Notes are automatically created, without confirmation. I don't see a need for a confirmation dialog. Each new note is just an empty file in /home/user/.yellownotes
It doesn't take any space on Flash/SD card and creating a new note doesn't take any longer than switching to an existing one. It's like all 99 note are already existing and you just have to put text into them.

The reason why I did implement it this way is, that using the applet should be as easy as possible. When writing down notes, I don't want to bother with note creation or deletion. I just want to start typing right away.

When turning a page of a real notebook, there is also nobody asking, if that's really what you want to do.

Though I will change the logic in a way, that when switching to a non-existing note and again switching to the next/previous note without entering any text, the new note will not be saved and no empty file will be created for it.

For the reason explained above, imo this doesn't really make sense. Especially, because there is no functionality for note deletion. Just for erasing the content of an existing note. So what would be the overall number of notes? The number of note-files, even if some of them are empty? Or just the number of notes which contain text?

The new version is still doing this.
I have to check how this is currently being done. At least there seems to be no code in the yellownotes applet, which is causing this behaviour. So I guess it's something which is automagically done by the application framework.
But I think such a functionality would make sense.
Or once I have again added an lock/unlock button something like (configurable) transparency when the applet is in view mode and no transparency when it's in edit mode.