How can I remove <em> tags from the source code?

Hi,
I'm not sure if it should go here. However, here is the problem I'm facing.
I did the export of contents (Drupal 6.12) from the Wordpress (via the “Wordpress Import” module). It worked well in general , beside one thing - the front page (the first one) populates the source code of the output with the em tags. Oddly enough, it happens only with the front page. The em tags go into the:

- all, or some of the menu items (it really depends on a theme used)
- page selector in the bottom of the front page
- some, but not all of the content headings (all publications are of “story” type)
- some, but not all of the “xy comments”, “new comments”, “add comment” links.

Could somebody please help me out with that?
Grateful in advance, JT.

ps
If you think the issue doesn't belong to this thread, please suggest more appropriate place for it.