[Mailman-Users] "Path info. No list -2-" error

[Kaja P. Christiansen]

Some time ago the archive search on tug.org got broken; while 
the first page with search results looks fine, attempts to access 
consequent pages return error:

  htdig Archives Access Failure
  Path info. No list -2-

It looks like all 45+ lists are affected (I checked only four). 
Does anyone have a suggestion what may cause this and what to 
look for?
We're running mailman 2.1.2 with htdig 3.1.6 under RedHat 7.2;
last htdig patch applied: htdig-2.1.2-0.3.patch.

Kaja