I'm running Kmail under Debian Sarge. It works fine, except for two things (which may be related):

If I get an HTML message and open it, turning on HTML rendering,I typically don't see the images.

also

If I click on a link in one of the messages, Friefox (my default browser) opens fine and I can see the message, although it often ahs missing graphics. If I click on a link within the page it tells me that it can't find it.
The message I get seems to indicate that it has apparantly downloaded the original page to a temporary file and can't find the new page in that temp directory.

If I copy the link, open Firefox separately, and paste the link into the location bar, the page opens normally with all graphics and the links work.

Is this a configuration problem?