>But the particular users do tend to never close a screen. Do we need to limit the number they can have open at the same time to protect them from themselves, or is this not a problem?

In FPD2.6, I've used Read Timeout 900, so if they do nothing with the form for fifteen minutes, it closes itself (I've programmed the reaction of the forms to accept this as if the user pressed Escape.

Probably something like this can be achieved with a timer, which would check itself whether any of the things happened since its last run - like, recno(), set("order"), getfldstate() and such. So if nothing happened after three checks (and let's have a five minute interval), tablerevert() everything and thisform.release.

In any normal environment this should not be necessary, but with electicity going up and down like here (and it wasn't too many orders of magnitude better before the bombing), and users going to another room for a coffee (and staying there for half an hour or more), it's better to be smart and close the form.