[horde] after debian upgrade to lenny, "DB Error: Extension not found"

[Robert P. J. Day]

  after a full upgrade of etch to lenny earlier this morning, any
attempt to access horde on the server generates

  A fatal error has occurred

  DB Error: extension not found

  Details have been logged for the administrator.

i've been googling already, and numerous people report that it's an
issue regarding kronolith[2?] and PHP.  i can't do a debian upgrade on
anything related to horde since all of that was installed simply by
unloading tarballs, so can anyone suggest the proper fix?

  i can see something that might be relevant under:

    <sitename>/horde/kronolith/lib/Scheduler/kronolith.php

is that something i should be investigating?  and where would those
details have been "logged"?  where would those diagnostic msgs have
gone by default so i can read any extra detail i can get my hands on?
thanks.

rday
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Robert P. J. Day                               Waterloo, Ontario, CANADA

        Linux Consulting, Training and Annoying Kernel Pedantry.

Web page:                                          http://crashcourse.ca
Twitter:                                       http://twitter.com/rpjday
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