I am pasting portions of flappadap's post from the old site, as I am having the exact same problem and hope to get a response here:
"flappadap" wrote:Integramod 1.4 (upgraded from 1.3.2d)
phpBB 2.0.19
HTML is enabled for post and in general settings
All tags are in the list of allowed html.
When I post a topic with html code in it, preview shows it correctly but after submitting, I see only the HTML code.
When I select the post as news to display on the portal page it is parsed correctly and shows correctly there ... but displaying the same post with viewtopic.php shows html code only ...
I could not have summed it up better. Since I have an identical setup and I am experiencing the same problem, I have labeled this post as a [ BUG ]. Thanks in advance for any help!