Malte,
This is one fix Lars made: http://cvs.openacs.org/cvs/openacs-4/packages/acs-tcl/tcl/text-html-procs.tcl?f=h&r1=1.21&r2=1.20
Apparently, according to his commit message there was one other bug in this tcl proc and it is fixed on HEAD.
The forums packge runs HTML formatted posts through ad_html_to_text before delivering the data to the search package to generate the summaries.
