Comment 4 for bug 227781

From the Debian changelog:

  * Replaced build-dependency apache2-dev || apache2-threaded-dev with only
    apache2-threaded-dev.
  * Replaced apache2 binary dependency with apache2-mpm-worker, as the built
    module for threaded apache will not work with prefork apache.

This is a blatant lie and misunderstanding of the apache2 headers. He was *always* building against threaded headers (apache2-dev pulls in threaded headers), so the first change made no difference whatsoever and, if the package always worked with -prefork before (which is should have, and people claim it did), it still would.

Backing out the second change would be a pretty non-intrusive thing, pretty much a no-brainer for Intrepid, and probably a good idea for a Hardy SRU as well, assuming this module actually has a userbase of any sort.