ThunderBird and DAV calendars

Hello.

Is anyone here using ThunderBird and DAV calendars?

After the upgrade to 91 I'm still able to use the calendars I had 
configured before, but I cannot add any new one, since the password 
prompt never appears.
I asked on Mozilla's ml, but they say it works (and in fact does, on 
Windows).

So I'm trying, first of all, to find out whether this is:
_ a problem of mine;
_ a problem on FreeBSD;
_ a problem on X (I have no Linux to test).

TIA to anyone who is willing to try.

  bye
	av,.