Thanks for the "boiling-down" of your config file. That helped me to reproduce the error quickly. It only occurs if you have a date/time attribute which is hidden as a conditional attribute. This is a unusual combination, that's why I haven't seen that bug before. Actually some 
JavaScript code checks the validity of the date attribute, but since it is conditionally not there, the JavaScript code crashes, which triggers the dialog box you see. It's now fixed in the repository.

/Stefan


> I have a little problem with elogd 3.1.0. The problem persists up to the latest ELOG version, even in the
> development branch (V3.1.0-8196b81):
> 
> When I want to "Submit" a new entry, I get a javascript pop-up that asks me:
> 
> _This page is asking you to confirm that you want to leave - data you have entered may not be saved._
> 
> with the options:
> "Stay on page" or "Leave page".
> 
> The entry is properly submitted if I agree to "Leave page".
> But it is very confusing for my users: they are afraid to loose their entry text.
> 
> This problem only shows for some specific logbook configurations.
> Below is a minimal logbook configuration that shows this problem:
> if you select "entry = short", the pop-up is shown;
> if you select "entry = long", the pop-up is not shown, the entry is created immediately.
> 
> Attributes = entry, when
> Options entry = short{1}, long
> Type when = datetime
> {1} Show Attributes Edit = entry
> 
> 
> (PS: it took me several hours to boil down my 120 line configuration into four lines :-) )