>My partner just created Yet Another listserv from user request, and when she
>did that, the drop-down menu of lists in the web interface list management
>page disappeared.  We deleted it and all was well again.  With some
>experimentation, we discovered it wasn't that particular list, just any one
>that put us over 53 (nice round number, eh?)
>
>Does anyone know what is causing this behaviour?  I don't see anything in
>listserv.log.

Section 11.4 of the Site Manager's Manual says:

| List owners who have only one or just a few lists running on the server
| will be presented with a drop-down list box from which they can choose
| the list they want to work on (only their own lists will be displayed).
| Site maintainers will either see the drop-down list box (on servers with
| up to 51 lists) or a plain text box (on servers with 52 or more lists).
| Either type or choose the name of the list you want to work on, and click
| the button for the operation you want to perform.

I think it's clear that there should be a cut-over from drop-down
menu to text box at some point; selecting a particular mailing list
from a drop-down list containing thousands of lists would be
ridiculous.  I'm not sure why you're only seeing this when the number
of mailing lists is greater than 53; as noted above you should see it
when you have more than 51.  (Perhaps you're logged into the web
interface as a non-site manager?)  Note that listowners who manage
fewer than 52 mailing lists should still get the drop-down menu.

The point at which the web interface switches from drop-down list to
text box is not configurable at present

Thanks,
--
Jacob Haller, Technical Support
L-Soft international, Inc
http://www.lsoft.com/