ok, actually i've found just this kind of bugs (hopefully)
i've winXP with a multiuser-system
usually i use el when i'm logged as administrator, and it works great
i've tried to log as a normal user (with some read/write restriction and such) and it crashes when i start it, it says:
run-time error '75':
errore di accesso al percorso/file
i can translate it in something like "error accessing path/file"
due to this crash i haven't tested wath happen if el try to save a file in a path where the user hasn't the ability to write ...

ps: actually i've some problem simila problems with other programs, so it's possible that it's my fault

someone else make some test!